Outside the district, Republicans in Gloucester and Camden Counties will choose their freeholder nominees in contested primaries. Evesham Township will have its first-ever primary because voters there changed elections from nonpartisan to partisan. Races for the U.S. House top the ticket this year in New Jersey, and Adler is the only sitting South Jersey incumbent with a tough battle ahead.
A lot - or maybe not enough - has happened in the country and his Third District since 2008, when Adler captured the seat.
Voters have become impatient as they wait for economic turnaround. Tea party groups have sprung up to protest bank bailouts and health-care programs.
But Sharon Schulman, director of the Hughes Center at Richard Stockton College, said she didn't know whether this race would experience much of a tea party effect, even though the groups have screened and endorsed candidates. "I don't know if the tea party can turn people out," she said.
Analysts believe that Republicans are likely to gain House seats in the 2010 races, and that the Third District seat is among about 80 in play.
"This will be a very competitive race," said David Wasserman, the House campaign expert with the nonpartisan Cook Political Report. "But Adler is one of the most talented campaigners in the freshman class. He knows the right time to strike, and he knows how politics works. He's been at this for three decades. That is such a huge advantage even in a tough climate like this one."
But first the primaries.
On Tuesday, Adler faces an underfunded, barely known Democrat in Barry Bendar, 54, of Forked River, who says he is running because he's angry with Adler for voting against Obama's health-care plan. But because Bendar, the Lacey Township Democratic chairman, has been unable to get his message out, his candidacy will not become a test of Democratic disappointment in Adler's vote.
Turnout for Adler in the primary may indicate whether Democrats are angry over the health-care vote, Wasserman said.