NEW YORK (AP) — Donald Trump will make history as the first former president to stand trial on criminal charges when his hush money case opens Monday with jury selection.

The case will force the presumptive Republican presidential nominee to juggle campaigning with sitting in a Manhattan courtroom for weeks to defend himself against charges involving a scheme to bury allegations of marital infidelity that arose during his first White House campaign in 2016.

It carries enormous political ramifications as potentially the only one of four criminal cases against Trump that could reach a verdict before voters decide in November whether to send him back to the White House.

Here’s what to know about the hush money case and the charges against Trump:

WHAT’S THIS CASE ABOUT?

The former president is accused of falsifying internal Trump Organization records as part of a scheme to bury damaging stories that he feared could hurt his 2016 campaign, particularly as Trump’s reputation was suffering at the time from comments he had made about women.