After two years of Trump, the Democrats should do well in the midterms. However, that might depend on the quality of their candidates. If they continue down the insane road that they're on now, they're likely to underperform in 2026, just as the Republicans did in 2022, thanks to the terrible quality of Republican candidates that year.
Assuming the Democrats win back the House, they'll probably impeach Trump four or five more times before the end of his term just for the hell of it.