In one of the most surprising Cabinet appointments of his transition, President-elect Donald Trump announced last week that he intends to nominate Rep. Lori Chavez-DeRemer (R-OR) to be secretary of labor.

The announcement was significant for a few reasons, but especially because Chavez-DeRemer was the preferred choice of the International Brotherhood of Teamsters, one of the nation’s largest labor unions and, until recently, a perennial ally of the Democratic Party.