EXCLUSIVE — The National Republican Congressional Committee is launching an attack ad on Rep. Henry Cuellar (D-TX), a vulnerable Democrat whom President Donald Trump pardoned last year.

Cuellar filed for reelection as a Democrat just hours after Trump pardoned him, enraging the president, who slammed the Democrat for having a “lack of loyalty.” Republicans have long been eyeing Cuellar’s seat in southern Texas and have tied him to Rep. Jasmine Crockett (D-TX), who is in a challenging race to be the Democratic nominee for Senate in the state.