DENVER, Colo. -- Sen. Marco Rubio (R-Fla.) took advantage on Wednesday of Vice President Joe Biden's comment that the middle class has been "buried" in the past four years, saying Biden might be the best asset Republicans have in the upcoming election.

"For the last four years the American middle class has been buried ... no, those aren't my words," Rubio said in Denver. "Those happen to be the words of the distinguished vice president of the United States of America."

"No, don't boo, he's the best thing we've got going, guys," Rubio said. "Because in a moment of clarity, in a brief moment of clarity, he told us what we already knew."

Rubio's speech -- ostensibly to Latino voters but in reality to a mostly white audience -- was part of the campaign's Juntos Con Romney push. He spoke to about 300 people on the top floor of the National Western Center, which hosts rodeos and other events. Rubio took some time to speak in Spanish, again making reference to Joe Biden, but delivered most of his remarks in English.

Romney continues to struggle with Latino voters, with only 26 percent saying they support him versus the 70 percent who support Obama, according to a CNN poll released Tuesday. Rubio's pitch to Latinos was that Romney can better serve the economy -- a view that so far Latinos don't agree with, according to the same poll -- and can help them better the country for their children.

"Big government doesn't help the middle class, it buries the middle class," Rubio said.

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