The newly released Epstein files are pretty shocking. According to them, Trump apparently bragged about having sex with his former 28-year-old aide, Madeline Westerhout. It also claims he deliberately skipped trips to Mar-a-Lago with Melania during holidays so he could stay at the White House and be with Westerhout.
If true, this is extremely serious and would obviously be grounds for impeachment.
(That said, keep in mind these kinds of explosive claims from document dumps are often heavily disputed, taken out of context, or still being fact-checked—people are digging into the actual files right now to see what holds up.)