Senior politics writer for U.S. News and World Report David Catanese told viewers Wednesday on "Special Report with Bret Baier” that "this is going to be a brutal two weeks” for Hillary Clinton. 

"She's sharpening line of attacks. So she's going to go at him with everything. I think it's going to be a tough, tough run for the Sanders campaign," Catanese said.

Her rival Sen Bernie Sanders is on a roll after his double digit victory Tuesday night in Wisconsin and winning the last six of seven primaries. 

"I think the Clinton campaign is worried that he could creep up on her. I mean he's going to draw some huge rallies in that state, there are a lot of liberals in New York we know of."