Support among Republicans for former Speaker Newt Gingrich (R-Ga.) has tumbled in recent weeks, according to a new poll Wednesday.

Thirty-two percent of likely Republican primary voters have a favorable opinion of Gingrich, compared to 34 percent who view him unfavorably, according to a new NBC/Wall Street Journal poll. That's a fall from the 32-13 percent favorable rating he faced in April.

The drop for Gingrich follows a series of gaffes he made in late May that tripped up his campaign just days after its formal launch. It also follows the mass resignations last week by senior advisers over a disagreement between them and Gingrich over how to pursue the campaign.

The numbers are an ominous warning for Gingrich that it could be difficult to reverse his fortunes and make a strong bid for the Republican presidential nomination.

And his woes have even translated to general election voters, who give Gingrich their harshest rating in the history of the Journal poll.

Forty-eight percent of Americans said they have a negative impression of Gingrich, an all-time high in the history of the poll. Sixteen percent of U.S. adults have a positive opinion of the former Speaker.

Gingrich has sought to revive his campaign by hitting the campaign trail this week and appearing in this past Monday night's Republican presidential debate, where he escaped any questions about the staff shake-up.

Gingrich appears to be putting the departures behind him, too, explaining that he feels "liberated" by the changes to his campaign.

The poll, conducted June 9 to 13, has a 3.1 percentage point margin of error.