In an e-mail to supporters, Rep. Mike McMahon’s campaign touted a poll conducted by his consulting firm, Global Strategy Group, that found the Staten Island Democrat leads both his GOP challengers by more than 30 percentage points.

According to the poll, which was not released in full, McMahon is ahead of Michael Grimm, 56-23 with 21 percent undecided; and beats Michael Allegretti 56-24 with 20 percent undecided.

McMahon’s strong showing comes in spite of the fact that the Republicans have a one-point generic advantage in the district (NY-13) and is largely due to his bipartisan support. The congressman is popular among Democrats (55-18 favorable/unfavorable), Republicans (57-15) and independents (47-15).

The poll concluded that McMahon is “well positioned to win his first re-election campaign” despite the fact that NY-13 is a swing district where Sen. John McCain defeated President Obama by two points in 2008 and President Bush beat Sen. John Kerry by 10 points in 2004.

(The NRCC has tried to make an issue of the ties McMahon and other Democrats have to Global, which recently settled with AG Andrew Cuomo in his ongoing pay-to-play pension fund probe, but that effort hasn’t gotten much traction).

The same e-mail, signed by McMahon campaign manager Jonathan Yedin, highlights three upcoming fundraisers, including a June 3 reception “at the home of Mayor Michael Bloomberg.”

McMahon has been under fire from progressive Democrats and labor unions due to his refusal to switch his “no” vote on health care reform.

There was briefly a threat that the left would back a primary challenger to McMahon, further complicating what was already widely viewed as a tough election cycle for him. At the very least, SEIU/1199 and the Working Families Party – two key allies for NY congressional Dems – made it clear they won’t endorse any “no” voters.

That uproar seems to have died down somewhat – at least in NY-13. McMahon’s 2008 primary opponent, Stephen Harrison, was mulling a re-match, but appears unlikely to run again this year, and labor is quietly moving to make peace with the congressman, sources said.

The same cannot be said in NY-24, where Rep. Mike Arcuri, who has so far refused to announce whether he’s going to seek re-election, continues to be a target of the left.