Today is September 5, 2019. Exactly 1 year, 1 month, 29 days from now. More than enough time for the Republicans to find good candidates in every retiring district. The only reason they don't is because they do not want to win.
Republicans can fool Conservatives (led them around by the nose) with their “pro life” stance on abortion ( even though Rowe codified it ) and advance their globalist anti American worker polices while in the minority. The Dems have let them have that niche and the two parties are just fine with that power balance. When it comes down to it there is little political conflict between the globalist Democrats and the globalist Republicans. What little conflict there is is just for show.