'We're way past collusion': House Intel Dem predicts Mueller's 'closing act' may implicate Trump
President Donald Trump's dispute with Democrats over border wall funding has led to the longest-ever US government shutdown. (AFP / Jim WATSON)

A Democratic member of the House Intelligence Committee said collusion has been proven between the Trump campaign and Russia -- and he suggested evidence of conspiracy may be shown at the highest levels.

Rep. Jim Himes (D-CT) cautioned that no one knew what evidence special counsel Robert Mueller had about the possible conspiracy, but the lawmaker said enough had been shown to raise alarm.

"We're way past collusion, right," Himes said. "If collusion is helping each other out, there was lots of helping each other out. The question is, was there coordination and quid pro quo? Is Michael Cohen or Roger Stone or anyone else, the president, on record as saying, 'Hey, if we do this, we will get that?' That's when you move from collusion to criminal conspiracy. I think that's the remaining shoe to drop out of the Mueller investigation."

Himes said he expected Mueller might eventually implicate the president himself.

"Nobody knows what Bob Mueller has, but if, in fact, a conspiracy on the part of a presidential campaign to conspire to defraud the American people or defraud the government, that, believe me, is the closing act, the fourth movement in that symphony," Himes said. "I don't think it gets revealed around a character like Roger Stone or Michael Cohen, that, that is the closing act of this whole thing."