An endorsement from Mr. Clinton would make 38% of people look at the candidate more favorably, compared to 24% who would take a less favorable view. No other politician in the survey had a net positive more than one percentage point, the mark earned by Mrs. Clinton and First Lady Michelle Obama.
President Barack Obama, 2012 GOP presidential nominee Mitt Romney, New Jersey Gov. Chris Christie and GOP Sens. Ted Cruz of Texas and Rand Paul of Kentucky all would leave a more negative view of their endorsee among registered voters. ...
For Republicans, the best campaign surrogate is Mr. Romney at 59%. Less than a third of Republicans said that Messrs. Christie, Paul and Cruz would leave a positive view of whoever they endorse – the latest evidence of the split nature of the GOP base.
Only Mr. Clinton and Mr. Paul would give a boost to candidates from independent voters, the poll found.