Resurgence: Tea-party candidate Marco Rubio is gaining credibility with the GOP establishment

That reaction — and praise from the Chamber that is directly challenging the Tea Party in some races — is one sign of Rubio’s rising stock in the Republican political establishment. Look also to New Hampshire, where Rubio headlined three fundraisers on Friday and where the state’s representative to the Republican National Committee told the Associated Press that Rubio, who rode to office in the tea-party wave of 2010, “comes across as a serious and thoughtful mainstream conservative.”…

“The so-called establishment wants to make sure they have folks that can win,” says Republican strategist Kevin Madden. “Rubio clearly has a profile that is very attractive as a national candidate. He can also attract a growing part of the electorate with Hispanic voters and also some moderate to conservative Democrats.”

At the same time, Rubio has far more reach into the tea-party world than do Christie and Bush, the candidates the establishment has already courted — and been spurned by — this campaign season. Christie has long battled skepticism from the Right, which remains scornful about his embrace of President Obama days before the 2012 election; he finished dead last in a February poll of tea-party activists. Bush finished second to last in the same poll. Among the party’s most conservative voters, the former Florida governor is handicapped by his support for immigration reform and for the Common Core educational standards, against which the tea-party base is waging a vocal revolt; Bush lacks the conservative bona fides that would help conservatives overlook his own support for a sweeping immigration overhaul.