Jeb Bush, Donald Trump feud intensifies in Republican primary

Republican presidential candidate Jeb Bush escalated his feud with Donald Trump on Tuesday, betting big he can re-energize his stalled campaign by challenging the billionaire businessman head on.

It's a risky strategy for the former Florida governor, still considered the GOP front-runner by many party officials, but a move his advisers suggest is necessary to reverse Trump's unlikely ascension to the top of the 2016 presidential class.

Bush intensified his criticism of the former reality television star on multiple fronts, first releasing a web video featuring clips of Trump himself promoting traditionally liberal positions in old interviews. "You'd be shocked if I said that in many cases I probably identify more as a Democrat," Trump says in the video produced and promoted by the Bush campaign titled "Liberal Things That Trump Says."

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In a subsequent Fox News interview, Bush charged that "Trump is more a Democrat than a Republican." Speaking to reporters in English and Spanish in Miami later in the day, Bush said: "He attacks me every day. He personalizes everything. If you're not totally in agreement with him, you're an idiot, you're stupid, you have low energy, blah, blah, blah. That's what he does."

The Bush campaign reports that Tuesday's political assault was not an isolated incident, but part of a broader strategy to engage Trump more directly. While the two have traded jabs before, the approach marks a shift for Bush, who previously preferred to ignore Trump's bombast altogether.

"Trump has attacked Jeb's wife, his mother, he's taken him out of context and lied about his record," said Bush spokesman Tim Miller. "It's incumbent upon us to not just set the record straight about Jeb's record, and not just fight back, but also expose Trump as somebody who's completely misrepresenting himself to voters."

Miller promised the campaign would release "more digital products," such as the video, in the coming days, while Bush would continue to be aggressive on the campaign trail.

Trump hits back on Twitter

Bush, the son of one president and brother of another, is certainly not the first Republican presidential contender to go after Trump, yet he has the highest profile of the critics. The struggles of Trump's other critics offer a pointed reminder of the risks of confronting a man whose business is confrontation.

Trump released a web video of his own later in the day highlighting Bush's praise for the Clinton family. And on Twitter, Trump noted that other presidential contenders have tried to take him on.

He dismissed Bush's video as "yet another weak hit by a candidate with a failing campaign. Will Jeb sink as low in the polls as the others who have gone after me?"

Indeed, former Texas Gov. Rick Perry, New Jersey Gov. Chris Christie and Kentucky Sen. Rand Paul have lashed out at Trump at times over the summer. Each man dropped in the polls as Trump grew stronger.

Bush maintains an overwhelming fundraising advantage over much of his Republican competition but he, too, has struggled in recent polls. Quinnipiac University pollster Peter Brown noted that no candidate has suffered more during Trump's rise than Bush.

"Obviously, Trump has found at least for now a strategy that works," Brown said, adding that Bush may be trying to pitch himself "as less of a policy wonk and more of a potential president who can dish it out as well as he can take it."

Political operatives note that the next phase of the 2016 campaign is just beginning.

After a summer season in which most voters typically don't closely follow national politics, many candidates, Bush among them, will start advertising on television in coming weeks. A pro-Bush super PAC is set to spend $12 million on an advertising campaign to begin running in key states later in the month.

Bush "knows the contours of this primary will change by late fall and early 2016," said Republican operative Leonard Alcivar. "He also knows his super PAC is weeks away from dropping millions of dollars in positive TV ads and mail highlighting his conservative record as governor. When that happens, no one will be talking about web videos."

Former New Hampshire Republican Chairman Fergus Cullen praised Bush's decision to confront Trump.

"I've watched so many others pander I'm looking at your Scott Walker and Ted Cruz and the rest of the field run for cover," Cullen said. "I really think this is a leadership test. Trump is doing serious damage to our party."