Illinois Sen. Mark S. Kirk is the only Republican to rescind his endorsement of his party’s presidential nominee Donald Trump, and Trump hasn’t forgotten about it.

Trump told a town hall meeting in New Hampshire on Thursday that Kirk was “not doing so well” but that it was “not his problem.”

Unsurprisingly, the Illinois Democratic Party agreed with the real estate mogul.

“Donald Trump has proven himself totally unfit to be president, but even a broken clock is right twice a day,” said Sean Savett, a party spokesman.

[Vulnerable Republican Senators Take Different Approaches to Trump]