Yes, it will go away, but other candidates are now aware that Cruz’s campaign stretches the truth (or spreads lies) to win. They should adjust their own campaigns as needed.
Cruz and Trump should decide to cool it on the civil war to take out Rubio. Rubio could very well be the candidate if those two keep going at it.
That war will be huge again in South Carolina between Cruz and Trump. In Florida between Rubio and Trump.
I expect a lot of dropouts after NH to consolidate numbers to Rubio, and I think the hardest to get to go along will be the prince in waiting, Jeb. It is his crown after all.
Kasich has invested a lot in NH. He’s making a case for VP, I think.