Brett Kavanaugh's SCOTUS nomination could help Republican Senators stave off 202 challengers.
Senate Republicans are making an aggressive play to ward off primary challenges in 2020.
They are digging in behind Kavanaugh, showing the GOP base that they are fighting for Trump.
At least 21 Republican senators will be up for reelection in 2020, including GOP leader Mitch McConnell.
Politico says many of those 21 Senators are among Kavanaugh’s staunchest defenders.