A year away from Election Day 2024, former President Donald Trump is set to testify in a civil fraud trial and separately faces more than 90 criminal charges, setting up the possibility that a convicted felon tops the Republican ticket next November.

But it’s President Joe Biden’s political prospects that are plunging.

In another extraordinary twist to a 2024 campaign season that is more notable for court hearings than treks through early voting states, Trump is expected to be called to the witness stand in New York on Monday. This is hardly typical activity during a post-presidency. But Trump was, after all, the most unconventional president.