Democrat Doug Jones’s historic win in Alabama cuts the GOP’s lead in the Senate to 51-49, and gives the Democrats a narrow path to winning back the majority in the 2018 midterm elections.

Democrats face a tough task retaking the Senate, as their party has to defend more than 20 seats while Republicans are only defending eight. But President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE’s low approval ratings and a backlash against Republicans from suburban voters, first seen in Virginia’s elections last month and now in Alabama, are good news for Democrats.

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The path to a Senate majority is straightforward.

Democrats will need to gain two seats, first by securing a win in Nevada, the only state Hillary Clinton Hillary Diane Rodham ClintonButtigieg stands in as Pence for Harris's debate practice Senate GOP sees early Supreme Court vote as political booster shot Poll: 51 percent of voters want to abolish the electoral college MORE won in 2016 with an incumbent Republican senator on the ballot next year. Arizona, where Sen. Jeff Flake Jeffrey (Jeff) Lane FlakeJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Republican former Michigan governor says he's voting for Biden Maybe they just don't like cowboys: The president is successful, some just don't like his style MORE is retiring, has also long been seen as a potential pickup, while Democrats have a strong candidate for Tennessee’s open seat.

The party is also more hopeful about taking out Sen. Ted Cruz Rafael (Ted) Edward CruzTrump argues full Supreme Court needed to settle potential election disputes Press: Notorious RBG vs Notorious GOP The Hill's Morning Report - Sponsored by Facebook - Washington on edge amid SCOTUS vacancy MORE (R) in Texas. The Lone Star State, long thought of as a GOP stronghold, could be attainable if anti-Trump sentiment mounts.

“At the beginning of the year, for a variety of different reasons, I didn’t think reclaiming the majority was possible for Democrats,” said Jim Manley, former aide to former Senate Minority Leader Harry Reid Harry Mason ReidThe Supreme Court vacancy — yet another congressional food fight Trump seeks to turn around campaign with Supreme Court fight On The Trail: Battle over Ginsburg replacement threatens to break Senate MORE (D-Nev.).

“But in the last couple of months, I think it’s become more doable. What happened in Alabama is just the icing on the cake,” he said.

But while Alabama has Democrats optimistic about their chances of taking GOP seats, the party also has to protect its own incumbents. Trump won 10 states that are represented by Democrats up for reelection in 2018, carrying half of those states by double-digit margins.

Democrats acknowledge that hanging on to all 10 of those seats will be difficult, but they hope the ongoing feud between Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellPelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Senate GOP aims to confirm Trump court pick by Oct. 29: report Trump argues full Supreme Court needed to settle potential election disputes MORE (Ky.) and Breitbart News chief Stephen Bannon over primaries could hurt the GOP’s ability to unite behind the best Republican candidates.

Democrats also feel encouraged by the results in the Virginia and Alabama elections. Enthusiasm in those races was high, particularly among suburban, female, black and young voters.

“There will be many more Alabamas in 2018,” Senate Minority Leader Charles Schumer Chuck SchumerSenate Democrats introduce legislation to probe politicization of pandemic response Schumer interrupted during live briefing by heckler: 'Stop lying to the people' Jacobin editor: Primarying Schumer would force him to fight Trump's SCOTUS nominee MORE (D-N.Y.) told reporters on Wednesday.

“So you put that all together — the base being energized, millennials, overwhelmingly Democratic; suburbs, swinging back to the Democrats — and it means that things are looking good for us,” he said.

The most realistic opportunities for Democrats will come in Nevada and Arizona. But Democrats are now looking beyond the two most vulnerable GOP-held seats.

Democrats were already feeling energized in Tennessee, after recruiting former Gov. Phil Bredesen to run for the seat. Bredesen was the last Democrat to win statewide office there, though he hasn’t campaigned for office in 11 years.

The party might also re-examine their chances in Texas, where Democratic Rep. Beto O’Rourke is looking to unseat Cruz. A Democrat hasn’t won a Senate seat in Texas since 1988.

High-profile Democrats, including Texas Rep. Joaquin Castro Joaquin CastroHispanic Caucus members embark on 'virtual bus tour' with Biden campaign Hispanic caucus report takes stock of accomplishments with eye toward 2021 Democratic lawmakers call for an investigation into allegations of medical neglect at Georgia ICE facility MORE, have already ruled out Senate runs. But some Democrats are hoping that potential candidates who have decided against challenging Republican incumbents in red states will reconsider after the recent Democratic victories.

With so many Democrats up for reelection, though, party resources could be stretched too thin to boost candidates with more difficult bids against Republican incumbents.

For example, Democrats cheered Bredesen’s bid in part because he has a reputation for putting his personal wealth behind his bids. But for now, Bredesen has said he won’t self-fund, which could be a setback for the party.

Meanwhile, O’Rourke isn’t accepting money from political action committees — a move that might endear him to campaign finance reformers, but will cut off another potential source of cash. O’Rourke has proven to be a prolific fundraiser, but he’ll need an extra boost to compete against Cruz.

“I think the smart play is to think real hard about going beyond those 10 senators up for reelection and start figuring out how to put some money into some other races that could, in fact, be winnable now,” Manley said.

Still, it remains to be seen if Democratic success in Alabama can translate. Jones pulled off his upset in part because he ran against a uniquely flawed candidate who had built up a record of controversies even before he was accused of pursuing teenagers sexually — all factors that could have helped Jones’s showing with black voters and women.

“We nominated a very flawed candidate even before the revelations came out in Alabama,” said Doug Heye, a former Republican National Committee spokesman. “We shouldn’t forget that anger or dissatisfaction with a candidate is often the greatest [get-out-the-vote] device you have.”