In other words, he's taken his reality television persona to new heights (or lows, depending on your viewpoint) and is thus resonating with the angry, knuckle-dragging crowd.
The GOP itself gave birth to Candidate Trump, and now they're wringing their hands because their spawn has managed to capture the limelight and hijack their party - no mean feat in a field of contenders that boasts such colorful whackjobs as Ted Cruz and Bobby Jindal.
To add to the entertainment, Trump has already shown he's willing to attack his fellow Republican candidates with the same viciousness he unleashes on Democratic contenders. So, we're treated to the amusing spectacle of listening and watching as the GOP's leaders stumble and fall over themselves in a mad rush to condemn the presidential hopeful they themselves had a role in creating.
The party that gave us McCarthy's witch hunts for supposed Communists, Nixon's Dirty Tricks Squad and the "swiftboating" of John Kerry now has a true standard-bearer, and they have no one to blame but themselves.
The Republican Party deserves what it birthed, and that offspring is Donald Trump.