MORGANTOWN, W.Va. — Sen. Bernie Sanders has ventured into a stronghold for President Donald Trump to urge West Virginia’s Republican senator to resist efforts to repeal much of Barack Obama’s health care law.

Speaking to hundreds of supporters Sunday in Morgantown, Sanders said if GOP Sen. Shelley Moore Capito’s opposes her party’s health care bill, it would “make all of the difference” in derailing the legislation. He urged the West Virginian to resist any deals from Senate Republican leaders, saying no tweaking would “undo the massive damage” the bill would cause.

The existing bill would fail if just three of the 52 Republicans vote no, since all Democrats oppose it. Capito was among at least a dozen Republican senators who recently publicly opposed or expressed qualms about it, forcing a postponement of a vote.