I respectfully reject that McCain's honorable and sacrificial character-building experiences or his self-description as a "straight talker" place his veracity above question. I remember him sidling up to the media by falsely claiming George Bush didn't level with the American people about how long the Iraq war could take. I remember him blaming dirty campaign tricks on Bush in South Carolina in 2000, when investigations revealed there was no evidence Bush was behind it. I remember him joining liberals in slandering the truth-telling Swift Boat veterans as "dishonest and dishonorable." I remember his disingenuous derision of the across-the-board Bush tax cuts as being only for the rich. I witnessed him changing his position on immigration to shore up support in South Carolina, then after that primary arrogantly denying to Sean Hannity that he'd flip-flopped. People can assess for themselves whether McCain is always straight, but hopefully they'll base their decision on the evidence and not his hero status.
I seriously doubt McCain will win the GOP nomination, precisely because of his infidelity to conservative principles. Consider:
He crusades against Guantanamo, favors constitutional rights for terrorists but opposes tough interrogation techniques, was the ringleader of the Gang of 14, which legitimized the filibustering of judicial nominees, and is the godfather of political speech-suppressing and Democrat-favoring campaign-finance reform legislation.
He has displayed contempt for conservative evangelicals, opposed Bush's pro-growth tax cuts for reasons other than he says (spending), has engaged in other class-warfare rhetoric like demonizing oil and drug companies, co-sponsored the abominable McCain-Kennedy illegal immigrant-forgiveness/open-borders/Social Security zapping bill, and even voted for the Specter amendment, which could have conferred consulting rights on Mexico concerning the erection of a southern border fence.
He sold out on global warming, opportunistically opposed drilling in ANWR, favors re-importation of drugs from Canada, and promoted the McCain-Kennedy-Edwards patients bill of rights. Even his pro-life credentials are not as pristine as we're told: He opposes reversal of Roe vs. Wade and sided with anti-political speech zealots in filing an amicus brief against Wisconsin Right to Life.
Vote for McCain if you wish, but please don't insult conservatives by suggesting he's one of us.