What's the key reason why Donald Trump mania is sweeping the nation? For one, the real estate mogul and Republican presidential candidate has a larger-than-life personality. Yes, he's arrogant. Yes, he's bombastic. Yes, he speaks his mind and doesn't apologize for it. You'd think this would be the recipe for a catastrophic campaign, but Donald Trump is leading in the polls -- and it isn't even close right now. Why has he had so much success? People credit him with being the only one with enough bravado to voice what's on his and every other candidate's mind. As an outsider from the world of business, he's appealed to people who are sick of politics getting in the way of progress on Capitol Hill. It goes without saying that Trump's flamboyance has allowed him to easily overshadow his more sedate opponents. Watching last night's debate, you got the feeling that guys like Rand Paul and Chris Christie strove to show that they, too, coul...