During an interview on CNN's "New Day," Brian Fallon said there is a "zero percent chance" that Clinton would not go to the Democratic National Convention in Philadelphia as the nominee,.

CNN's Chris Cuomo then asked how Fallon could be sure.

Fallon responded that with a "good outcome" in the New York primary on Tuesday and in the five states voting on April 26, "we think we could be approaching 90 percent of being the way there in terms of 2,383, the number of delegates that you need."

"And then at that point there's a few contests in May, and when you add up the pledged delegates that she's amassed right now, she's got a lead of about over 200 pledged delegates over Sen. [Bernie] Sanders," Fallon continued, adding that the campaign expects to win more delegates in next month's contests even if Sanders carries the popular vote.