Donald Trump, who recently pulled out of moderating a Newsmax-sponsored GOP debate that only Newt Gingrich and Rick Santorum would commit to, has switched his voter registration to "independent," a source confirms. The move was made yesterday, and will make Trump a registered "blank" — used interchangeably with "registered independent" in New York political parlance — but not right away. A Board of Elections spokeswoman hasn't responded to a call for comment about when it would take effect, but sources familiar with the city's BoE rules say that Trump missed the cutoff allowing his registration switch to take effect for...