The spat between two leading GOP presidential nomination candidates has sunk to a new low, as Donald Trump and Jeb Bush spent the entire weekend throwing non-stop barbs at each other, with Bush forced to defend his family honor over 9/11.
The feud heated up on Friday, when the property mogul appeared to imply that George W. Bush was at least partly at fault for the 2001 attacks that brought down the World Trade Center, as they happened on his watch.