MoveOn, the liberal activist group launched to counter GOP efforts to impeach President Bill Clinton, is keeping the impeachment of President Trump alive with a series of attack ads targeting vulnerable Senate Republicans.

Two days after all but one Senate Republican, Mitt Romney of Utah, voted to acquit Trump on two articles of impeachment, MoveOn took aim at Sens. Susan Collins of Maine, Cory Gardner of Colorado, and Martha McSally of Arizona. According to independent expenditure disclosures filed with the Federal Election Commission, the group is running spots on television and Facebook against the three endangered Republican senators.