Here's a paragraph, but you need to read the whole thing:
"According to current political wisdom, John McCain is "controversial" among Republicans because he lacks true conservative credentials. His main offenses, ostensibly, are a smattering of domestic-policy positions that defy the GOP's Limbaugh-Hannity orthodoxy: He took a public stand against the Spanish Inquisition, he shared a room with Ted Kennedy for a few hours to fashion a failed immigration bill, he passed a roundly criticized campaign-finance-reform bill, he accidentally deemed the Bush tax cuts insane out loud before realizing that this was a political error."
http://www.rollingstone.com/politics/story/18721308/mccain_resurrected