With Democrats taking control of the US House, but Republicans tightening their grip on the Senate, the split congress means a new political reality that both parties will have to get used to.

This could lead to a number of things. Impeachment proceedings could begin against President Donald Trump in the House, and his tax returns could be requested and viewed. And given the fact congress is more diverse after the midterms, there could be a push to change some of the president’s most divisive policies surrounding immigration.

But how likely are each of these things to happen?

Democrats may use control of the House to push for Trump to publish his tax returns

Democrats needed to flip 23 House seats from the Republicans to take control of the House, eventually managing it even before results from traditionally Democrat-leaning California came in.

There is some debate whether House Democrats will be able to ask for Mr Trump’s tax returns, a point of contention throughout his campaign for president.

It has become tradition for presidents to make their returns public, however Mr Trump has said repeatedly the Internal Revenue Service (IRS) was auditing him and he would have to wait until the audit was complete for the returns to be made public.

Tax returns are rarely leaked because the penalty for it is a federal crime, punishable by up to five years in prison.

This chart shows the Battle for US House of Representatives after the 2018 midterm elections (The Independent)

That has yet to happen, and it is IRS policy not to discuss matters like that publicly.

One set of returns, for 2005, was made public last year but it revealed little in terms of sources of income or ties with any Russian entities, on which critics have been seeking transparency.

“There’s ample justification” for the Ways and Means Committee to go after Mr Trump’s personal and business tax returns, Texas Democratic congressman Lloyd Doggett has said. He added: “We need to act on this promptly.”

A 1924 law allows the chairman of the committee to examine anyone’s tax returns in private, without their permission, and to share the information with committee members.

US Midterms 2018: The five big questions

Democrat Richard Neal, the likely incoming chair of the committee, said he would pursue the IRS filings, however legally it may be difficult to make them public.

The request also has to pass through the Treasury Department, whose head Steve Mnuchin is a noted supporter of Mr Trump.

The agency said in a statement: “Secretary Mnuchin will review any request with the Treasury general counsel for legality.”

Democratic congressman Elijah Cummings, who is set to become the chair of the House Oversight Committee, said about requesting Mr Trump’s tax returns: “Tax returns may tell you something else – that’s why we would like to see them.”

“Right now, we have a president who is accountable to no one,” he told CNN.

House members would have to actually vote to make the filings public, which could happen with Democratic control of the chamber.

It is not an unprecedented move, either.

US midterm results: more diverse, more female and more progressive Show all 20 1 /20 US midterm results: more diverse, more female and more progressive US midterm results: more diverse, more female and more progressive Democratic candidate Ilhan Omar is celebrates with her husband's mother after she won a congress place, becoming the first Muslim woman to be elected into congress alongside Rashida Tlaib Reuters US midterm results: more diverse, more female and more progressive Democratic House candidate, from Kansas, Sharice Davids (left) and her mom Crystal celebrate after she won. Davids is the first lesbian Native American Congresswoman by beating Republican incumbent Kevin Yoder. Davids is one of several first-time female candidates that helped the Democratic Party takeover in the House of Representatives EPA US midterm results: more diverse, more female and more progressive Republican Marsha Blackburn celebrates after winning the race for senate in Tennessee. In doing so she became that state’s first female senator AP US midterm results: more diverse, more female and more progressive Supporters of Democratic House candidate Sharice Davids cheer and cry after learning she won EPA US midterm results: more diverse, more female and more progressive Ayanna Pressley beaome Massachusetts’ first black congresswoman by defeating 10-term Republican Michael Capuano AFP/Getty US midterm results: more diverse, more female and more progressive Republican candidate Young Kim has become the first Korean-American woman elected to Congress AP US midterm results: more diverse, more female and more progressive Democrat Jared Polis won his seat and became the US’s first ever openly gay governor AAron Ontiveroz/The Denver Post via AP US midterm results: more diverse, more female and more progressive Jean Kasselman (left) and Teresa Booker, supporters of Democratic candidate for Kansas' 3rd Congressional District Sharice Davids, react to election results Getty US midterm results: more diverse, more female and more progressive Republican Kristi Noem hugs a supporter after being announced as the new governor of South Dakota. Noem made history by being the first female governor of the state AP US midterm results: more diverse, more female and more progressive Gabierla Martinez and Cesar Delgado cheer on Democratic gubernatorial candidate Jared Polis REUTERS US midterm results: more diverse, more female and more progressive Alexandria Ocasio-Cortez became the youngest women ever elected to Congress, representing New York’s 14th congressional district AFP/Getty US midterm results: more diverse, more female and more progressive Democratic congressional candidate Rashida Tlaib celebrates with family and friends at her midterm election night party in Detroit after won and also became the nation’s first Muslim woman to congress alongside Ilhan Omar who was also elected Reuters US midterm results: more diverse, more female and more progressive Supporters of Democratic candidate for Kansas' 3rd Congressional District Sharice Davids react to election results Getty US midterm results: more diverse, more female and more progressive Already having become the first Native American woman to chair a state political party, Deb Haaland has now become the joint-first Native American woman to be elected to congress, alongside Sharice Davids Reuters US midterm results: more diverse, more female and more progressive Supporters of Alexandria Ocasio-Cortez cheer during her election night party in the Queens Borough AFP/Getty US midterm results: more diverse, more female and more progressive Young Kim hugs her son Alvin after she won a seat in congress AP US midterm results: more diverse, more female and more progressive Supporters of Alexandria Ocasio-Cortez cheer AFP/Getty Images US midterm results: more diverse, more female and more progressive Asma Mohammed and Ashley Fairbanks celebrate as results come in at Democratic congressional candidate Ilhan Omar's election night headquarters AP US midterm results: more diverse, more female and more progressive Democrat Deb Haaland hugs a voter REUTERS US midterm results: more diverse, more female and more progressive Supporters of Democratic House candidate from Kansas Sharice Davids cheer and cry after learning she won her race EPA

President Richard Nixon had his returns made public by congress in 1974.

Here is where classic Washington politics come in: Mr Trump and the administration can protest and tie up the issue in the court system for years, well past the incoming House’s two year terms.

Democrats could retaliate in the short term by cutting budget items to the Treasury Department.

Impeachment proceedings are now a real possibility but not inevitable

A number of Democrats have said they are prepared to open several investigations into the president and his administration, but will likely be wary of pursuing impeachment immediately.

Devin Nunes, the congressman from California, is the current chair of the House intelligence committee, which has ended its investigation into Russian election meddling and alleged collusion between Donald Trump‘s 2016 campaign team Russian officials.

It is thought when his California colleague, Democrat congressman Adam Schiff, takes over that investigation could be reopened, in a potential route towards impeachment proceedings.

However, House Democratic leader Nancy Pelosi told PBS Newshour: “For those who want impeachment, that’s not what our caucus is about.” Ms Pelosi added that she will wait for the outcome of Special Counsel Robert Mueller’s federal investigation into the election meddling and possible collusion before deciding what move to make. She noted that a call for impeachment “would have to be bipartisan, and the evidence would have to be so conclusive”.

A push for impeachment could backfire in 2020, in states and districts that were carried by Mr Trump in his 2016 run.

Congressman Cummings told CNN that although Democrats were eager to get to work, he did not want to give voters the impression the new House would “rush in and beat up on Trump”.

However, the will of the people – around 40 per cent of voters in the 2018 midterms, according to a CNN exit poll – want impeachment to be on the agenda, and those proceedings start in the House of Representatives.

Mr Trump has all but dared the new congress to try to impeach him, saying he would adopt a “warlike posture” against any new investigations.

He added: “They can play that game, but we can play it better, because we have a thing called the United States Senate...I could see it being extremely good for me politically because I think I’m better at that game than they are, actually, but we’ll find out.”

Despite the party’s hesitation, New York congressman Jerry Nadler issued a warning to the president on election night.

He said: “This election was about accountability. [Mr Trump] may not like hearing it, but for the first time his administration is going to be held accountable.

“He’s going to learn that he’s not above the law.”

But even he argued “it’s way too early” to discuss impeachment, preferring to see what is found in thorough investigations.

Congresswoman Maxine Waters has been calling for impeachment since Mr Trump entered office, but she may have to go along with the party for the sake of maintaining control and possibly passing some legislation on their agenda.

Republican control of the Senate foreshadows Trump’s 2020 run

With republicans having gained at least two seats in the Senate, they have strengthened their grip on the chamber and so can block legislation that can come from the Democrat-controlled House.

Control of the Senate means Mr Trump can keep getting conservative federal judges confirmed – something his administration has already been doing in record numbers. As Mr Trump’s cabinet appointments are also confirmed by the Senate, any changes will likely face little difficulty in being approved.

The chamber could also block full impeachment proceedings.

And by gaining, rather than losing, Senate seats it means Republicans have a vastly improved chance of keeping control through 2020, when they will be defending 22 of 34 seats up for grabs. The tables have been turned from this year’s election, when Democrats had to defend 26 of 35 seats.

The new ‘Year of the Women’ means a slightly more representative Congress

More than two decades ago, in 1992, a “Year of the Women” was declared as the most women ever were elected to the US congress.

What followed was blocked legislation and condescension from male colleagues, as female members jockeyed for political power and legitimacy.

This year could very well be different as we saw the most women ever running for office around the country, and winning. Several of these women, many of them under-represented minorities, have made history in other ways as well.

Rashida Tlaib becomes the first Muslim woman to be elected to the US congress, in Michigan – and just a bit later, and not to be outdone, Minnesota voted Ilhan Omar to join her.

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Both women will represent their state’s growing Arab-American and Somali-American immigrant populations, respectively.

Two of the first Native American women to serve in Congress were elected as well: Sharice Davids of Kansas and Deb Haaland of New Mexico.

Their election wins mean all the more since North Dakota, just days before the election, barred Native American voters who lived on reservations from voting in the state, saying they needed an address that was not a post office box, the address which was issued to them while living on the federal, protected land.

In New York, Alexandria Ocasio-Cortez made history as the youngest woman to ever be elected to Congress, at the age of 29.

Ayanna Pressley became the first black female to represent Massachusetts, and she is from John F Kennedy’s former seat.

Marsha Blackburn became the first female senator to represent Tennessee.