Poll: Michelle Obama would be Hillary’s strongest Dem rival in 2016
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If Michelle ObamaMichelle ObamaHungry for shame — who’s trashing America’s school lunch? Make national service a priority Trump gets royal welcome during 'tremendous' Saudi Arabia visit MORE decided to run for president in 2016, she would pose the most significant threat, among likely contenders, to Hillary ClintonHillary Rodham ClintonClinton: ‘I don’t die’ despite the right’s ‘best efforts’ Clinton: Comey firing is ‘an effort to derail and bury’ Russia probe RNC slams Clinton speech as example of 'why she lost' MORE's chances of winning the Democratic nomination, according to a new Rasmussen poll.

A telephone survey of 1,000 likely voters conducted by the polling company found that in a hypothetical match-up between the current first lady and the former secretary of State, Clinton would best Obama 56 percent to 22 percent.

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That may seem like a significant margin, but according to the most recent RealClearPolitics polling average, Elizabeth WarrenElizabeth WarrenSenate panel approves Scott Brown as NZ ambassador Senate confirms Trump's first lower-court nominee The Hill's 12:30 Report MORE, a popular hypothetical challenger to Clinton, receives only 12.5 percent to Clinton's 64 percent.

Sen. Bernie SandersBernie SandersThe Hill's 12:30 Report Five takeaways from the Montana special election Hillary Clinton targets troubled Trump, divided GOP with new PAC MORE (I-Vt.), the only other major Democratic candidate in the race for president, is even further behind, with 7.4 percent. Former Maryland Gov. Martin O’Malley, who is expected to announce his bid on May 30, fares the worst against Clinton, with 1.2 percent of support from likely voters.

The first lady is highly unlikely to mount a presidential campaign, however. In fact, of the people surveyed by Rasmussen, just 14 percent thought she should run.

Still, 40 percent of black voters welcomed the idea of her running, and she bests Clinton among those voters, with 44 percent support among African-Americans compared with 36 percent for Clinton.

Obama herself recently joked about a possible October surprise, hinting to "Late Show" host David Letterman that the thought had crossed her mind.