Former House Speaker Newt Gingrich's (R-Ga.) support among Republicans has tumbled somewhat following a brush with the congressional GOP over its budget, a new poll said Tuesday.

Thirty-two percent of Republicans and Republican-leaning independents who recognized the former Speaker said they have an unfavorable opinion of him, the highest unfavorable rating among the GOP figures running or considering a run for the party's presidential nomination in 2012.

Sixty-one percent said they have a favorable opinion of Gingrich, according to a Gallup poll released Tuesday. That means he still enjoys a wide net-favorable rating among Republicans, but that's well down from the 75 percent of Republicans who said they viewed Gingrich favorably as recently as early April. His favorable numbers are the second-lowest of other GOP presidential contenders.

The diminished numbers follow a rough stretch for Gingrich following his criticism of Rep. Paul Ryan's (R-Wis.) budget and its proposed reforms to Medicare, from which the former Speaker was forced to backtrack after facing tough criticism from conservatives. He also had to clarify his stance on the use of an individual mandate to implement healthcare reforms.

The poll, conducted May 16-29, has a 3 percent margin of error.