A lobbying and public communications shop with close ties to the Clintons and the Democratic Party, the Glover Park Group, has received a substantial infusion of capital from a Chicago private equity firm, Svoboda Collins LLC.

The Glover Park Group, which has offices in Washington and New York, is home to a number of Democratic heavyweights, including a former press secretary to President Clinton, Joseph Lockhart, and a longtime adviser to Senator Clinton, Howard Wolfson.

Mr. Wolfson referred an inquiry about the deal to the chief operating officer at Glover Park, Chip Smith. Mr. Smith said the transaction did not represent a huge windfall for the firm’s partners, but will provide capital to expand operations, including those in New York.

“The purpose of this deal is to take our company to the next stage. If people were interested in cashing out, there were a lot of alternatives on the table,” Mr. Smith said.

Mr. Smith declined to give a dollar value for the deal, which delivers a stake of slightly more than 50% to the private investors. However, he said Glover Park expects more than $30 million in revenue this year. “We have a level of profit that is competitive or better than the rest of the industry,” Mr. Smith said.

One investor who is seeking to arrange an initial public offering for a group of lobbying firms, Kenneth Ducey Jr., said valuations for lobbying firms vary from four times to as much as 20 times earnings. “It’s all over the map,” he said.

In the last year or two, a series of Washington-based lobbying firms have been snapped up, most by large public relations and advertising companies.

A former Clinton White House aide working as a lobbyist, Steven Elmendorf, said the Glover Park deal signals the strong market for well-run communications campaigns.

“It’s a sign these businesses are very lucrative,” Mr. Elmendorf said. “The stuff you learn campaigning, politics and persuading people in this world, gets transferred over to governing.”

An investment banker who helped arrange the deal with Svoboda Collins, Greg Smith of AdMedia Partners, said Glover Park stands to benefit from the expected Democratic gains in yesterday’s election, but that wasn’t the driving force behind the transaction.

“It’s pretty funny that the timing worked out this way,” the banker said. “Obviously, Glover Park is pretty well positioned with some of the ties in the Democratic community they’ve got. … The company’s been just an outstanding performer from a financial standpoint even in a Republican-dominated Congress and White House.”

Glover Park caused some surprise when it went to work for the firm that owns Fox News and the New York Post, News Corp. The business relationship heralded a rapprochement between the Clinton camp and the News Corp. chairman, Rupert Murdoch.

Glover Park’s other clients include businesses such as Madison Square Garden and Verizon, as well as the government of Taiwan and a firm owned by the emir of Dubai. Recently, the firm also signed up an international banking consortium, the Society for Interbank Worldwide Financial Telecommunication, or Swift. That group landed in the news after the New York Times reported on a classified program under which the American government searched for suspicious transactions crossing the Swift network.

The new funding for Glover Park was first reported yesterday by a Capitol Hill newspaper, Roll Call.