Novak: Bush Against Romney

According to Robert D. Novak, President Bush does not like Mitt Romney's "hard line" position on immigration:

While President George W. Bush has maintained neutrality among contenders for the Republican presidential nomination, he privately expresses to friends his exasperation with Mitt Romney's hard-line stance on immigration.

Bush is upset that Romney changed his position on the issue, compared to what it had been when he was governor of Massachusetts, at the expense of the president's immigration reform. Bush and Sen. John McCain are not close, but the president is grateful for McCain's support on Iraq and immigration.

This is one ginormous reason to get behind Romney rather than McCain.