Politics

DENVER (AP) ― Mitt Romney, a potential John McCain running mate playing Republican pit bull on the periphery of the Democratic National Convention, charged Tuesday that a Barack Obama presidency would "make America a weaker nation."

The United States under an Obama administration would see "less prosperity, and less security," said Romney, in what could have been an 11th-hour audition to join McCain's ticket.

The former Massachusetts governor led a Republican delegation to the convention city to rain on Obama's parade. Obama, though, wasn't even there; he'd decided earlier to methodically wend his way here, making campaign appearances along the way.

Holding a news conference on the fringe of the convention arena, Romney cited Obama votes on taxes and proposals for government spending. And he took note of the Illinois senator's comment earlier this year in debate that he would negotiate with leaders of rogue nations.

Summing up his pitch, Romney questioned the Democrat's judgment, saying: "Barack Obama is a charming and fine person with a lovely family but he's not ready to be president."

At a luncheon with reporters earlier, Romney also brought up two associations Obama has with questionable figures, naming scandal-scarred Chicago businessman Antoin "Tony" Rezko and 1960s radical William Ayers. And Romney insisted he was in Denver only to help McCain get elected and not to audition for running mate. "I'm not in any way trying to promote my qualifications, or to dissuade others of my disqualifications, to serve on a McCain ticket," he said.

Later, he held the news conference at the GOP's "rapid response" bunker and intruded on the Democrats' venue, doing interviews with cable networks from inside the very Pepsi Center where the convention is being held.

Obama's campaign responded that McCain's choice "won't make a lick of difference to struggling American families" because the Republican ticket will offer the same policies as the unpopular President Bush.

McCain's campaign dispatched Romney, who is believed to be a top contender for the vice presidential spot on the ticket, specifically to assail Obama. Another Republican said to be in serious contention for the No. 2 slot, Minnesota Gov. Tim Pawlenty, was scheduled to play attack dog in Denver on Thursday.

The Arizona senator is expected to name his vice presidential pick in the coming days. McCain and his running mate are expected to appear together at one or more rallies planned for Ohio, Pennsylvania and Missouri in the run-up to the GOP convention that starts Monday in St. Paul, Minn.

For now at least, McCain's campaign is mum on the deliberations. Uncharacteristically, so, too, is the candidate himself.

In San Diego on Tuesday, however, McCain recognized one of Romney's sons, Matt, who was in the audience and said: "Nobody worked harder than the five Romney sons" during the primary. He noted that Romney himself was all over the airwaves as a surrogate, and quipped: "He does better on television for me than he did for himself."

McCain's prospective running mates, for their part, are dodging questions about the process to avoid violating McCain's demand for secrecy around his search. But the appearances by Romney and Pawlenty in Denver are certain to stoke speculation and invite questions.

"I don't have anything to tell you about Senator McCain's vice presidential selection process," Romney said repeatedly when asked about his prospects on Tuesday.

Likely by design so top McCain aides could gauge their effectiveness, both Romney and Pawlenty have emerged as top surrogates for McCain over the past few months as he has weighed his choice.

Romney, a former McCain rival, would bring economic credentials and a battle-honed pitch from the rough-and-tumble GOP primary to the team, while Pawlenty, a longtime McCain ally, would bring a solid conservative resume and blue-collar roots.

But both men also present drawbacks for the GOP ticket.

Romney's enormous wealth could exacerbate Democratic attacks on McCain's gaffe over not knowing how many houses he owns. Romney also made unflattering comments against McCain in the primary that the opposition certainly would use against the ticket.

Pawlenty's relative youth, at age 47, could highlight McCain's distinction of potentially being the oldest first-term elected president; he turns 72 on Friday. And Pawlenty isn't as seasoned as others, including Democratic vice presidential pick Joe Biden, in the attack role that a running mate typically plays.

It's possible that McCain could make a nontraditional selection for the GOP ticket, such as abortion-rights backers Tom Ridge, the former Pennsylvania governor, or Democrat-turned-independent Sen. Joe Lieberman of Connecticut. Both are close friends of the candidate.

Either of those options, however, would inflame the GOP's conservative base and risk party-splitting acrimony at the Republican convention next week.

(© 2009 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)