The candidate, Tan Nguyen, was trying to unseat Representative Loretta Sanchez, a Democrat.
Mr. Boehner has donated $7,000 to Mr. Iott's efforts to unseat Representative Marcy Kaptur, a Democrat.
In the Central Valley, Republicans are aiming to unseat Representative Jerry McNerney, who in 2006 beat a Republican incumbent.
Some supporters distanced themselves from the comments made by Mr. Broden, who is trying to unseat Representative Eddie Bernice Johnson, a Democrat.
Adriano Espaillat, the incumbent, has focused most of his energy recently on running an unsuccessful race to unseat Representative Charles Rangel in Congress.
"Ground zero is hallowed ground to Americans," Elliott Maynard, a Republican trying to unseat Representative Nick J. Rahall II, a Democrat, in West Virginia's Third District, said in a typical statement.
The group is seeking to help elect Rabbi Shmuley Boteach, who is running as a Republican to unseat Representative Bill Pascrell, a New Jersey Democrat.
Charles Morgan, Democrat of Buffalo, would have to rub a lamp with a genie inside to unseat Representative Byron Cook, Republican of Corsicana, in November.
In 1996, John Mitnick, a Republican, tried to unseat Representative Cynthia A. McKinney in Atlanta, and was accused by Ms. McKinney's father, Billy, of being a "racist Jew".
Mr. Boquist, who is struggling uphill to unseat Representative Darlene Hooley, a two-term Democrat, could be fined $100 if found guilty.
