Mike Gallagher
The former president went after at least one GOP House member in a short but nasty Truth Social note.
His resignation, to be effective in April, will cut House Republicans' already narrow margin over Democrats even further.
The House Committee on Energy and Commerce voted unanimously to pass the bill, which the White House has also endorsed.
U.S. Rep. Mike Gallagher says he won't run for a fifth term in Congress.
WHAT'S HAPPENING
Rep. Mike Gallagher is mocked after delivering one helluva hot take on Christmas trees.