Larry Sabato’s Crystal Ball: “Like every post-World War II president, Donald Trump witnessed a fall-off in his party’s numbers of U.S. Senate, U.S. House, gubernatorial, and state legislative seats during his presidency. That said, compared to recent presidents, the erosion on Trump’s watch was more modest than it was for his immediate predecessors.” “One obvious difference is that Trump had only one term in office and escaped a ‘six-year-itch’ election.