THE STEALTH CANDIDATEhttp://www.nytimes.com/2012/04/17/us/politics/aides-play-down-romneys-comments-on-tax-changes-for-wealthy.htmlSenior advisers to Mitt Romney said Monday that Mr. Romney, the presumptive Republican nominee for president, was merely tossing around ideas, not making policy announcements, when his chat with donors about some significant changes to the tax code was overheard by