The number increased by one on Saturday after Sen. Bill Cassidy lost his reelection primary in Louisiana to Rep. Julia Letlow. The previous four had retired, albeit under pressure from Trump. Sens. Susan Collins of Maine and Lisa Murkowski of Alaska are now the only two GOP senators left who voted to impeach Trump. Just two of the 10 House Republicans who voted that way remain in Congress: Reps. David Valadao of California and Dan Newhouse of Washington. Trump celebrated Cassidy’s exit, but his happiness may be tempered after his approval rating reached a second-term nadir of 37%, according to the latest polling from the New York Times/Siena College.

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