(CNN) - Sarah Palin's favorability rating among Republicans continues to slide as the former vice presidential nominee mulls a White House bid, according to a new survey.
A Washington Post/ABC News poll released Wednesday indicates 58 percent of Republicans and Republican-leaning independents give Palin high marks, a 30-point drop from her favorability rating among the same group in the weeks leading up to the 2008 presidential election. It also marks a 12-point drop from a Washington Post/ABC News poll last fall when the former Alaska governor traveled the country on behalf of a string of congressional candidates.
In what could be another ominous sign, Palin's unfavorable rating is at 37 percent in the new survey, an all time high in Washington Post/ABC News polling and a number that far surpasses that of other potential presidential candidates including Newt Gingrich (26 percent), Mitt Romney (21 percent), and Mike Huckabee (18 percent).
The former Alaska governor has said she has made no decision about a potential run for the White House and will mount a campaign if she sees a path to victory. But Palin has engaged in few behind-the-scenes maneuvers, traveled to virtually none of the key early-voting states, and has skipped high-profile conservative forums that some other potential 2012 candidates lined up to attend.
Meanwhile, a recent survey of likely Iowa caucus-goers suggested Palin's support is slipping in that key state as well: A Des Moines Register poll three weeks ago found the former Republican vice presidential nominee's favorables had slipped 6 points in the last year and a half, a number that may indicate the excitement around the 2008 Republican vice presidential nominee is beginning to dissipate as other likely presidential candidates have spent significantly more time there.
This Washington Post/ABC News poll was conducted March 10-13 and interviewed 414 Republicans and Republican-leaners by telephone. It carries a sampling error is five percentage points.