EXCLUSIVE — Former Vice President Mike Pence’s political advocacy group is pushing lawmakers to vote against President Donald Trump’s nominee for labor secretary unless she disavows some pro-union stances.

Trump picked former Rep. Lori Chavez-DeRemer for secretary of labor. Chavez-DeRemer’s nomination was a surprise to some Republicans because she is seen as a pro-union populist and voted for labor legislation that conservatives vehemently oppose.