Mr. Pougnet, the Democrat running for Ms. Bono Mack's House seat in Palm Springs, openly discloses his sponsorship of the telephone calls and mailings he is directing to conservative voters labeling Mr. Lussenheide as "the Tea Party candidate" and Ms. Bono Mack as a "raging liberal" by comparison.
"It's the strangest thing I've ever seen," Ms. Bono Mack said. "It's desperate, and I think the voters see right through it."
Mr. Pougnet's campaign manager, Jordan Marks, said, "There's nothing wrong with pointing out to voters who are more conservative that there's a more conservative alternative on the ballot."
In other efforts, Democrats have tried to keep a lower profile, though they have not always succeeded.
In Michigan, local Republicans and Tea Party activists were immediately suspicious when a "Tea Party" ballot line appeared with candidates running for two competitive House seats and several state offices. The ballot line was thrown out on a technicality last month, but only after a series of blog and newspaper reports uncovered the hidden hand of two Oakland County Democratic officials. Both men resigned.
Mr. Lentz's admission this week that his supporters had a role in placing Mr. Schneller on the ballot in the Pennsylvania House race followed months of suspicion that Mr. Lentz was somehow involved. He had avoided questions until this week, when he told the editorial board of The Delaware County Daily Times, "If somebody's already made the decision to run, I didn't think that 'helping' with the process of signature petitions was improper."
Here in Florida, local Republicans and grass-roots Tea Party activists continue to press the case that "Tea Party" candidates on the ballot are stalking horses for Democrats, an assertion denied by Democrats.
Everett Wilkinson is among grass-roots Tea Party activists disconcerted to learn of a "Tea Party" linked to Mr. Guetzloe.
Polls and independent analysts suggest that the incumbent Democrat in Orlando, Representative Alan Grayson, a firebrand liberal whose defeat is eagerly sought by conservatives, faces an uphill fight to keep his seat in what has been a bitterly fought campaign against his Republican rival, Daniel Webster. But the candidate running on the "Tea Party" ballot line in Orlando, Peg Dunmire, could prove pivotal if Mr. Grayson is to pull off a squeaker.
The "Tea Party" in Florida was formed and registered with the state in 2009 by an Orlando-area lawyer, Frederic B. O'Neal, with help from a longtime client, Doug Guetzloe, an activist, radio host and Republican operative in a running feud with his party, who has earned a reputation as a political trickster. (On Friday, Mr. Guetzloe was sentenced to 60 days in prison for a misdemeanor campaign violation relating to an anonymous political flier he sent four years ago, but his sentence does not start until after the election.)
Tea Party activists in the state said they were flabbergasted to learn of the existence of a "Tea Party" ballot line and Mr. Guetzloe's involvement with it.
"I didn't know who the heck these people were," said Everett Wilkinson, a grass-roots activist who has tangled with Mr. Guetzloe and Mr. O'Neal in separate lawsuits.
The grass-roots Tea Party activists and state Republicans, have homed in on a number of connections between Mr. Grayson and Mr. Guetzloe that have become fodder in the local news media, especially in reports on the CBS affiliate, WKMG-TV.
Mr. Guetzloe serves on two business advisory boards set up by Mr. Grayson. A son of Mr. Guetzloe worked as an intern in Mr. Grayson's Congressional office last year. Federal Election Commission filings show that Mr. Grayson has paid nearly $50,000 to a polling firm that was incorporated in late 2008 by an on-and-off employee of Mr. Guetzloe, Victoria Torres, who is now herself running as a state candidate on the "Tea Party" ballot line that Mr. Guetzloe helped create.
In his most recent campaigns, Mr. Grayson advertised on Mr. Guetzloe's local radio program before it was canceled this year, with some proceeds going directly to Mr. Guetzloe's company, including, at least in June, a modest commission, station records show.
Mr. Guetzloe played down his connections to Mr. Grayson, saying that he is one of scores of people on Mr. Grayson's advisory panels and that his son secured his internship at Mr. Grayson's office through his school.
"This has nothing to do with the Democratic Party; it has nothing to do with Alan Grayson," said Mr. Guetzloe in an interview.
In an interview outside his house, Mr. Grayson dismissed as "conspiracy theories" suggestions that he had any contact with Mr. Guetzloe regarding the "Tea Party" ballot line. "The Republican Party of Florida wants people to think that there's something here," he said. "The old saying where there's smoke there's fire? Here there's not even any smoke."
Late last month, in a legal battle between Mr. Guetzloe and grass-roots Tea Party activists who accuse him of hijacking their movement, Wade C. Vose, a local election lawyer representing them, issued a subpoena for Mr. Grayson to sit for a deposition. Mr. Grayson was also ordered to share all written or electronic communications he had had with Mr. Guetzloe, members of the registered "Tea Party" and others. That deposition was to take place on Thursday.
Last week, however, Mr. Guetzloe dropped his defamation suit, filed in May, citing procedural wrangling with Mr. Vose - scuttling the order for Mr. Grayson to answer questions.