Joe Biden has landed endorsements from several House Democrats representing some of the toughest battleground districts in the country as he works to prove his electability in swing states.

Biden’s presidential campaign announced on Sunday that it had won the backing from Reps. Conor Lamb and Chrissy Houlahan of Pennsylvania and Elaine Luria of Virginia — three centrists with military backgrounds — as he seeks a breakout moment in the purple state of Iowa next month.

All three of the House Democrats referred to Biden’s foreign policy experience, which the former vice president himself has repeatedly touted in the wake of the Trump administration’s killing of Iran’s top military commander last week.

“Our country needs a steady hand, someone who can help heal the country, an experienced and proven leader who can build teams with deep expertise and work across the aisle,” Houlahan, who served in the Air Force, said in a statement released on Sunday.

“Pennsylvania is not red or blue but a purple place which our next President needs to carry to win,” she said.