Democratic Congressional Campaign Committee
The ads are running as voters head to the polls Thursday.
The Republican candidate's alleged assault of a reporter on the eve of the election turned the race upside down.
The altercation happened on the eve of Montana's hotly contested special election for a U.S. House seat.
Rob Quist has already raised over $550,000 off Republican Greg Gianforte's flub.
WHAT'S HAPPENING
Progressive groups have already raised over $2 million for future campaigns.
It has been a rough week for Republican Greg Gianforte.
The DCCC is more than doubling down on folk singer Rob Quist.
The special election is another test of the backlash against Donald Trump.
Rob Quist and Greg Gianforte, running in a special election for Montana's lone House seat, clashed during their only televised debate on Saturday.