Harry Reid
If elected, the real estate mogul would be the "scammer-in-chief," according to the Senate Democratic leader.
Republicans have blocked bipartisan bills to bar people on terrorism watch lists from buying guns and explosives.
Trump quipped Reid should go back to doing the exercise that blinded one eye, and won a sizzling broadside from the pugnacious Democrat.
He calls The Donald a "human leech" who will bleed America dry and laugh about it.
WHAT'S HAPPENING
Trump has a gaming license for his Las Vegas hotel, but Reid says if he wanted to use it, the state would not let him.
Oh, and an agreement that would keep the government open.
The Senate's top Democrat noted that Trump doesn't exactly live the healthiest lifestyle, but reporters are focused on Hillary Clinton.
Harry Reid told reporters they should be more focused on Donald Trump's health, noting he's 70, overweight, and brags about eating fast food.
Obama's defense of the CIA sparked the vigorous response from the Senate Democratic leader.
"He’s a bigot, he’s a scam artist, he won’t show us his tax return, and Sen. Grassley is holding the Supreme Court vacant for this man," Reid said.