Senior Republicans are sounding the alarm about Rep. Lou Barletta’s, R-Pa., struggling Senate campaign in Pennsylvania, fretting that his lackadaisical, disorganized effort will hand a third term to incumbent Sen. Bob Casey, D-Pa.

President Trump rallied support for Barletta in a string of Wednesday afternoon tweets. But the congressman is taking fire from Republicans at home and in Washington who worried that he is relying too much on the president to boost his flagging Senate bid. Barletta has been a disappointing fundraiser and been too slow to ramp up a capable statewide campaign operation, his critics charge.