Two years out from the 2020 presidential race, President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE is raking in money from his small-dollar army as he gears up for a challenging reelection race.

Democratic presidential candidates are also hoping to harness that same small-dollar energy as they seek to stand out in a crowded field.

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More than half a dozen senators running or considering bids can also get an extra boost by transferring money from their Senate accounts.

Here are five takeaways from year-end fundraising reports filed with the Federal Election Commission (FEC) by the Thursday deadline:

Trump benefits from small-dollar army

Trump’s campaign isn't slowing down two years out from his reelection race.

He entered the year with $19.2 million in the bank and most of his contributions are still coming from small-dollar donors who will prove critical in the 2020 presidential race.

Trump’s campaign and his joint fundraising committees raised more than $21 million during the last three months of 2018. His campaign said most of his contributions came from donors who gave less than $200.

The president’s campaign also spent heavily during the end of 2018, steering $23 million to campaign ads, direct contributions to GOP candidates and other expenses from dozens of campaign rallies.

According to the FEC filing, Trump owes the Treasury Department over $1 million for travel expenses related to campaign rallies.

And his campaign also spent $838,000 on legal fees, which included money given to firms who have represented the president and those close to him regarding Russia election interference investigations, according to The New York Times.

Warren, Gillibrand lead the pack in Senate cash

Not all Democratic presidential candidates will be starting from square one when it comes to fundraising.

Sens. Elizabeth Warren Elizabeth WarrenJudd Gregg: The Kamala threat — the Californiaization of America GOP set to release controversial Biden report Biden's fiscal program: What is the likely market impact? MORE (D-Mass.) and Kirsten Gillibrand Kirsten GillibrandSunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Suburban moms are going to decide the 2020 election Jon Stewart urges Congress to help veterans exposed to burn pits MORE (D-N.Y.), who are both running for president in 2020, are the early leaders among the eight U.S. senators running or believed to be considering White House bids.

Warren leads the pack with $11 million cash on hand. Gillibrand is not far behind with $10.3 million in the bank.

Lawmakers with federal campaign accounts can transfer that money to use in a presidential campaign.

Sen. Bernie Sanders Bernie SandersJacobin editor: Primarying Schumer would force him to fight Trump's SCOTUS nominee Trump campaign plays up Biden's skills ahead of Cleveland debate: 'He's actually quite good' Young voters backing Biden by 2:1 margin: poll MORE (I-Vt.), who’s reportedly gearing up to announce another White House bid, has $9 million in his Senate campaign account.

Meanwhile, Sen. Cory Booker Cory Anthony BookerBipartisan praise pours in after Ginsburg's death DHS opens probe into allegations at Georgia ICE facility Democratic lawmakers call for an investigation into allegations of medical neglect at Georgia ICE facility MORE (D-N.J.), who’s the latest Democrat to enter the 2020 race, has $4.1 million.

And Sen. Kamala Harris Kamala HarrisJoe Biden looks to expand election battleground into Trump country Fox's Napolitano: Supreme Court confirmation hearings will be 'World War III of political battles' Rush Limbaugh encourages Senate to skip hearings for Trump's SCOTUS nominee MORE (D-Calif.) ended 2018 with $1.3 million, though she announced raising $1.5 million in online donations within 24 hours of her 2020 announcement earlier this month.

In the House, Rep. Tulsi Gabbard Tulsi GabbardRepublicans call on DOJ to investigate Netflix over 'Cuties' film Hispanic Caucus campaign arm endorses slate of non-Hispanic candidates Gabbard says she 'was not invited to participate in any way' in Democratic convention MORE (D-Hawaii) has $2 million stowed away for her long-shot presidential bid. She also faces a contested primary for her House seat, though she hasn’t confirmed if she will run for reelection.

Rep. Eric Swalwell Eric Michael SwalwellSwalwell calls for creation of presidential crimes commission to investigate Trump when he leaves office 'This already exists': Democrats seize on potential Trump executive order on preexisting conditions Swalwell: Barr has taken Michael Cohen's job as Trump's fixer MORE (D-Calif.), who plans to make a 2020 decision soon, has $1.6 million in his account for a presidential run.

Meanwhile, former Rep. Beto O’Rourke (D-Texas), who raised a record amount of money for his Senate bid in 2018, only has $286,000 in his account.

Republican Mark Harris Mark HarrisTrump sparks debate over merits of voting by mail The Hill's Campaign Report: Debate over mail-in voting heats up Bevin says he lost because liberals are 'good at harvesting votes' in urban areas MORE owes money after disputed race

Mark Harris, the Republican candidate in North Carolina's disputed 9th District race, went into the new year with about $19,000 cash on hand, having raised less than $4,000 in the last five weeks of 2018.

But the North Carolina Republican owes about $86,000, and $53,000 of that debt is to Red Dome Group, the consulting firm that contracted the man at the center of allegations about the misuse of absentee ballots.

Harris's year-end filing says the campaign owes Red Dome "reimbursement payment for Bladen absentee, early voting poll workers, reimbursement door to door.”

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Bladen County is one of the counties at the heart of the fraud investigation.

Meanwhile, Harris's rival, Democrat Dan McCready, has continued fundraising in the event that a new election is called.

McCready raised $503,000 and ended 2018 with $337,000.

The North Carolina Democrat currently trails Republican Mark Harris by 905 votes, but the state elections board declined to certify the results amid the fraud allegations. The board will soon vote at a February hearing whether to certify the race or call for a new election.

Vulnerable senators stockpile money

Democrats are emboldened about their chances of taking back the Senate in 2020, as they are set to defend 12 seats while Republicans are protecting 22 seats.

But a number of vulnerable GOP senators are already in good financial shape ahead of their tough reelection races.

Sens. Cory Gardner Cory Scott GardnerGraham: GOP will confirm Trump's Supreme Court nominee before the election Gardner signals support for taking up Supreme Court nominee this year Tumultuous court battle upends fight for Senate MORE (R-Colo.) and Susan Collins Susan Margaret CollinsGraham: GOP will confirm Trump's Supreme Court nominee before the election Gardner signals support for taking up Supreme Court nominee this year Tumultuous court battle upends fight for Senate MORE (R-Maine), the only two GOP senators up for reelection in states Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE won in 2016, have $1.7 million and $2.6 million, respectively.

Other targeted GOP senators have at least $1 million when they started 2019: Sen. Joni Ernst Joni Kay ErnstGraham: GOP will confirm Trump's Supreme Court nominee before the election Joe Biden looks to expand election battleground into Trump country Grassley, Ernst pledge to 'evaluate' Trump's Supreme Court nominee MORE (Iowa) has $1.3 million, Sen. Thom Tillis Thomas (Thom) Roland TillisGrassley, Ernst pledge to 'evaluate' Trump's Supreme Court nominee Trump to include North Carolina in offshore drilling moratorium, senator says Biden's six best bets in 2016 Trump states MORE (N.C.) has $2 million and Sen. David Perdue (Ga.) has $1.7 million.

Senate Majority Whip John Cornyn John CornynTumultuous court battle upends fight for Senate Texas Democrats roll out first wave of planned digital ads as Election Day nears Calls grow for Biden to expand election map in final sprint MORE (R-Texas) and Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellGraham: GOP will confirm Trump's Supreme Court nominee before the election Trump puts Supreme Court fight at center of Ohio rally The Memo: Dems face balancing act on SCOTUS fight MORE (R-Ky.), whose reelection races are expected to draw national attention, entered 2019 well-positioned with $5.7 million and $3.6 million, respectively.

Sen. Martha McSally Martha Elizabeth McSallyTumultuous court battle upends fight for Senate Grassley, Ernst pledge to 'evaluate' Trump's Supreme Court nominee The Hill's Campaign Report: Biden goes on offense MORE (R-Ariz.), who was recently appointed to fill the late Sen. John McCain John Sidney McCainBiden's six best bets in 2016 Trump states Replacing Justice Ginsburg could depend on Arizona's next senator The Hill's Morning Report - Sponsored by Facebook - Washington on edge amid SCOTUS vacancy MORE's (R) seat after losing her 2018 Senate race, ended 2018 with less than $1 million in the bank.

Meanwhile, Sen. Doug Jones (D-Ala.), who is seen as the most vulnerable Senate Democrat up for reelection, ended 2018 with $2.1 million in his account as he gears up for a challenging race in the deep-red state.

Jones hasn’t gotten a formal Republican challenger, but Rep. Bradley Byrne Bradley Roberts ByrneBottom line Jerry Carl wins GOP Alabama runoff to replace Rep. Bradley Byrne Jeff Sessions loses comeback bid in Alabama runoff MORE (R-Ala.) is among several Republicans seriously considering running. Byrne has over $1 million in the bank.

And in Kansas’ open-seat, Secretary of State Mike Pompeo Michael (Mike) Richard PompeoOvernight Defense: House Democrats unveil stopgap spending measure to GOP opposition | Bill includes .6B for new subs | Trump issues Iran sanctions after world shrugs at US action at UN Navalny calls on Russia to return clothes he was wearing when he fell ill US issues Iran sanctions to enforce UN action ignored by international community MORE has been heavily courted by Republicans to leave the Trump administration and run for the seat being vacated by retiring Sen. Pat Roberts Charles (Pat) Patrick RobertsThe Hill's Morning Report - Sponsored by Facebook - Washington on edge amid SCOTUS vacancy The Hill's Morning Report - Sponsored by National Industries for the Blind - Trump seeks to flip 'Rage' narrative; Dems block COVID-19 bill GOP senators say coronavirus deal dead until after election MORE (R-Kan.).

Before entering Trump’s Cabinet, Pompeo was a congressman for six years and still has $990,000 in his House account.

At the committee level, the National Republican Senatorial Committee began 2019 with $7.4 million in the bank, while the Democratic Senatorial Campaign Committee had $6.1 million.

Dems facing likely primaries build defenses

Some Democratic incumbents are already facing the threat of primary challenges in 2020. But they’ll have the advantage of incumbency and money.

Rep. Dan Lipinski (D-Ill.), who has become a frequent target of progressives, ended 2018 with $450,000 cash on hand.

While he doesn’t have a formal challenger, his 2018 primary challenger, Marie Newman, is considering another run after losing by 3 points.

If she decides to run, Newman would initially go into the race with a huge financial disadvantage. At the end of 2018, she had only $70 in the bank, though national groups could decide to again spend heavily on her behalf.

Rep. Stephen Lynch Stephen Francis LynchOvernight Defense: Dems divided on length of stopgap spending measure | Afghan envoy agrees to testify before House panel | Trump leans into foreign policy in campaign's final stretch Afghan envoy agrees to testify before House panel after subpoena threat Overnight Defense: Trump's battle with Pentagon poses risks in November | Lawmakers launch Fort Hood probe | Military members can't opt out of tax deferral MORE (D-Mass.), who soundly defeated several Democratic challengers in 2018, has plenty of money ready for another primary, with $1.4 million in the bank.

One of his primary challengers, video game developer Brianna Wu, has just $65,000 on hand. Wu has already declared she’ll run against Lynch in 2020 and has hired more staff than last time.

No names have surfaced as primary challenges to Rep. Henry Cuellar (D-Texas), who’s facing a primary threat from progressive group Justice Democrats. But he has millions stockpiled, with $2.5 million in his account.

And freshman Rep. Alexandria Ocasio-Cortez Alexandria Ocasio-CortezThe Memo: Dems face balancing act on SCOTUS fight Ocasio-Cortez hits back at Marjorie Taylor Greene over 'dumb blonde' joke on Twitter Ocasio-Cortez to voters: Tell McConnell 'he is playing with fire' with Ginsburg's seat MORE (D-N.Y.), who became a household name after defeating an entrenched incumbent last year, closed out 2018 with nearly $370,000 on hand.

Ocasio-Cortez stunned the political world by defeating Rep. Joe Crowley Joseph (Joe) CrowleyHillicon Valley: Election officials prepare for new Russian interference battle | 'Markeyverse' of online fans helps take down a Kennedy | GOP senators unveil bill to update tech liability protections 'Markeyverse' of online fans helps take down a Kennedy The Hill's Campaign Report: Trump visits Kenosha | Primary day in Massachusetts | GOP eyes Minnesota as a battleground MORE in her 2018 Democratic primary, but there are some rumblings about some Democrats potentially fielding a primary challenge.

Nationally, the Democratic Congressional Campaign Committee, the party's House campaign arm, outraised its GOP counterpart by $2 million in the last five weeks of 2018.

But the National Republican Congressional Committee ended with $16.5 million on hand, while the DCCC had $5.6 million.