DONALD Trump is facing a wave of crushing challenges over the next 24 hours that could define the future of his presidency.

What happens in the next day could also have implications for the remaining two years of his first term in office.

Firstly, Mr Trump’s bid to install a conservative judge to the United States Supreme Court has been thrown into chaos with the emergence of a third woman accusing his nominee Brett Kavanaugh.

The New York Post reports that in a signed declaration released this morning, a woman named Julie Swetnick alleges she saw Mr Kavanaugh and his friend Mark Judge spike punch at house parties so that women who drank it could be “gang raped” by a “train” of boys.

The allegation comes after Christine Blasey Ford accused Mr Kavanaugh of sexual assault. They are both due to testify about the allegations in front of the Senate Judiciary Committee on Thursday (US time).

Another accuser, Deborah Ramirez, said she remembers Kavanaugh exposed himself at a drunken dormitory party, thrust his penis in her face, and caused her to touch it without her consent as she pushed him away.

The eleventh-hour allegations have thrown a major hurdle in Mr Trump’s effort to confirm Mr Kavanaugh. The Democrats have a solid bloc in opposition to Mr Kavanaugh, fearing a conservative appointment would sway the Supreme Court to the right for a generation.

CNN reports key Republicans are swaying after the latest allegations which could deal a fatal blow to confirmation.

Mr Trump regularly pointed to his appointment of conservative Neil Gorsuch to the Supreme Court as one of his major achievements and is hoping to solidify that with Mr Kavanaugh. A failure to do so would be a significant blow.

The second momentous event due to take place within the day is a meeting between Mr Trump and his Deputy Attorney-General Rod Rosenstein in a conversation that could lead to Mr Rosenstein being fired.

Mr Rosenstein oversees special counsel Robert Mueller’s investigation into Russian interference in the 2016 election, which Mr Trump has regularly lambasted as a “witch hunt”.

The investigation has wide-reaching political and also potential legal implications, CNN reports.

Mr Rosenstein will be asked to explain media reports which suggested he invoked the 25th Amendment to remove Mr Trump from office.

There are concerns among Democrats that removing Mr Rosenstein is an example of Mr Trump’s attempts to obstruct Mr Mueller’s investigation.

Democrats have threatened to move to impeach Mr Trump if he fires Mr Rosenstein, according to the National Journal.

What happens with Mr Rosenstein could also have implications for Mr Trump’s second term as the midterm elections fast approach.

Polling shows the Republicans are facing a “blue wave” in the November elections, which could see the Democrats retake the House. There is also an outside chance the Democrats could win control of the Senate.

Minority Leader Nancy Pelosi has urged the Democrats not to turn the election into a litmus test for impeachment.

Politico reports many believe that Democrats will be able to successfully impeach Mr Trump, should they take the House and they will eventually do so.

All this means what happens in the next 24 hours could have reverberations for years to come.