No, regardless of today’s outcome, unless Cruz doesn’t carry Texas which he probably will, Cruz will keep going.
Birther II or not, there is a genuine dispute of a material fact about Cruz’s NBC eligibility and his refusal to cooperate to get this decided in federal court shows me bad faith on his part as far as his putting America’s future ahead of his own political future.
I don't think that there is any dispute about the facts: he was born in Canada to an American Citizen mother and a Cuban citizen father. There is no doubt about that. And a simple reading of the Immigration and Naturalization Act says that makes him a citizen by birth. The only other class of citizen is a naturalized citizen. One is eligible to be President, the other is not. The burden of disputing the law is not on Cruz. 99% percent of these legal challenges will be dismissed. The other 1% percent will be decided in favor of Cruz and the courts will let that stand. There will never be a court fight unless some state refuses to put Cruz or Rubio on the ballot. In that very unlikely circumstance, the courts will swiftly act and force the state to put them back on the ballot. End of story.