If we've learned anything from the last five years, we've learned that the Supreme Court will not declare him ineligible. I suspect that if Ted Cruz runs and is elected, the Supreme Court will continue to avoid jumping into these inherently uncertain waters by continuing to avoid such cases.
The most important question may be whether the left wing will be willing to send money to "lawyers" like Orly Taitz (assuming she is still licensed then) or whether the left wing will insist upon having its own crackpot counsel. More broadly, how will Ted Cruz change the birther industry?
There's a difference between Obama and Cruz. Obama's case has already been decided by the US Supreme Court, in Wong.
That's the biggest reason why the Court has ignored these birther challenges and let the lower federal and state courts handle it. It's already been adjudicated. They don't need to waste their time. There's no new precedent to set.
A Cruz case would be different in that it's never been definitively decided by the Supreme Court. For that reason, they might take the case.
Based on the reasons I've gone over in this thread, I think they would find Cruz eligible.
And surely there are as many crackpots on the left as there are crackpot anti-Obama birthers.
Of course, the leftists don’t care as much about the Constitution. The current crop of birthers at least pretend to care about the Constitution, although they savage it at every step.