In December 2012, 70% of those polled viewed Hillary Clinton favorably; in March 2014 it was down to 56%; and now, as President Obama's approval rating hits record lows, only 52% view Hillary Clinton favorably. "She is down across the board," notes the poll, "even with groups that have been her most ardent supporters." As Bloomberg reports, among likely 2016 voters, Clinton remains ahead with 47% support compared to 38% for each of her potential opponents.

As Bloomberg reports,

Fifty-two percent of Americans view the former secretary of state favorably, down from 56 percent in March and 70 percent in December 2012, according to the Bloomberg National Poll.

The decline means Clinton wouldn’t enter a possible 2016 race as a prohibitive favorite over key Republican rivals. While she still bests them in head-to-head matchups, she doesn’t have majority support against any of them.

Among likely 2016 voters, Clinton beats New Jersey Governor Chris Christie, 45 percent to 38 percent, the poll shows. When matched against Senator Rand Paul of Kentucky and former Florida Governor Jeb Bush, Clinton pulls 47 percent support compared with 38 percent for each of her opponents. Senator Marco Rubio of Florida registers only slightly weaker, drawing 36 percent backing to Clinton’s 47 percent.

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“Hillary Clinton may be suffering from contagion from President Barack Obama’s sinking scores. She is down across the board, even with groups that have been her most ardent supporters,”