The congressman who represents Salem, Mass., is taking President Trump to task for calling the investigation into possible collusion between his campaign and Russia a "political witch hunt."

"This is the single greatest witch hunt of a politician in American history!" President Trump tweeted Thursday morning.

Seth Moulton, D-Mass., responded on Twitter, playing off the fact that he represents a city synonymous with witch hunts.

"As the Representative of Salem, MA, I can confirm that this is false," Moulton tweeted.