All across the US, Republicans are quitting and withdrawing from the mid-term elections in 2018. Most people expect it to be a severely uphill battle for the party, with Democrats set to engage voters like never before and Republicans considerably less eager to vote for a party that is turning hard right and alienating its more moderate sympathizers, not to mention that they are hampered by the most inept president in modern history. Facing a humiliating defeat, Republican senators and representatives choose to drop out of the race instead of running for re-election.
Experienced lawmakers see the writing on the wall. If you are a Republican and have a brain, it's time to leave.