Bush — by far the best known among those running for the GOP nomination — is viewed favorably by just 33 percent of the public, while 53 percent say they view him unfavorably. Only Clinton among all those included in the poll has a net positive rating, but by the slender margin of three percentage points (49-46 percent). Her favorability rating has dropped nine points in the past year and 18 points since she left the State Department in 2013…

In the contest for the Republican nomination, Bush tops the field with 20 percent of Republicans and GOP-leaning independents saying they would support him if their primary or caucus were held today. He is followed by Texas Sen. Ted Cruz at 13 percent and Wisconsin Gov. Scott Walker at 12 percent. Five other Republicans receive at least 6 percent support, with an additional six candidates at either 2 or 1 percent. Bush, Cruz and Walker are the only three to register noticeable gains since the last Post-ABC survey on the GOP race in December…

Meanwhile, New Jersey Gov. Chris Christie, once regarded as a top-tier prospect for the nomination, has a major image problem within his party as well as with the public at large. He is viewed favorably by 38 percent of Republicans and Republican-leaning independents and unfavorably by 41 percent. Among all Americans, 51 percent have an unfavorable impression of Christie, topped only by Bush’s 53 percent.