Trump cannot answer the Obama place-of-birth question because he would either have to lie outright, or state that Ted Cruz is ineligible to run for president. Trump likes Cruz. He does not want to have to say that. But, he must, or admit that his entire Obama birth certificate campaign was a complete scam.
Trump and retired neurosurgeon Ben Carson have no defined program on education, health care, the economy and foreign policy. Yet they ride high at the top of the GOP polls. They're at the top by tossing out pithy, outrageous, and bombastic sounding quips on any and everything that comes to mind with full knowledge they will grab headlines and draw even more rapturous applause from the anti-Obama loathers.