There is a good chance that Republicans could lose. If they don’t support Trump’s agenda, Democrats will be more enthusiastic to vote than the GOP. When Republicans won in 2010, 2012, 2016, they campaigned on repealing Obama’s agenda. What are they running on now? They don’t support the wall or Trump’s immigration reform ideas, or his manufacturing ideas. They have supported the Mueller witch hunt.
*When Republicans won in 2010, 2014, 2016