Robby Mook is strongly insinuating Bernie Sanders is somehow lacking “sincerity” when it comes to guns being “trafficked” into New York from Sanders’ home state of Vermont.

He appeared on CNN on Tuesday to make the extraordinary claim hours before Wisconsin primary votes are tabulated.

Repeatedly looking away from the host, Mook said, “Sen. Sanders hasn’t been sincere here in New York which is facing serious problems with guns being trafficked from Vermont and other states.”

It’s likely not a coincidence he named only Sanders’ home state.

“He’s not being sincere when he doesn’t explain — when he’s not explaining why he voted, uh, against universal background checks five times. So I think he has a lot of explaining to do, uh, to the voters here in New York.”

“What is he being not sincere about specifically,” he was challenged.

“Well he’s not being sincere that he stood with the gun lobby repeatedly. Uh, they called it, they called this their number one issue.”

He continued, “(the NRA) certainly spent a lot of money to defeat his opponent in his 1990 election when he first got to Congress. He owed them a lot for his, for his first election.

“Uh, and when they came to him and said their most important vote in the Congress this year is, uh, is, uh, is a vote for immunity from liability suits, uh, to gun manufacturers, he voted with them,” Mook said.