Federal Communications Commission Chairman Kevin Martin said Tuesday there's no need for new regulation of the Internet, saying his agency has all the authority it needs to prevent discrimination by Internet service providers.

"I do not believe any additional regulations are needed at this time," Martin said at a hearing before the Senate Commerce Committee, noting recent enforcement actions by the commission. The FCC has conducted two hearings on "network management" following admissions by Comcast Corp. that it sometimes delayed file-sharing traffic for subscribers as a way to keep Web traffic flowing.

The hearing was called at a time when the issue of "network neutrality" — the principle that people should be able to go where they choose on the Internet without interference from network owners — has heated up.

The network neutrality debate has divided Congress, with Democrats largely in favor and Republicans mostly opposed, a point that became clearer at Tuesday's committee meeting.

"It is a political division now and it's getting more so," said Sen. Ted Stevens, R-Alaska. "It is unfortunate." He said a return to "intense regulation" of the Internet is "entirely unwarranted."

The hearing included some star power, with the appearance of Justine Bateman, best known for her role on the TV sitcom Family Ties. Bateman is now a founding partner of a new online media venture.

"The idea of your site succeeding or failing based upon whether or not you paid the telecom companies enough to carry your material or allow quick access is appalling," she told the committee.

Also speaking for a free-flowing Internet was Patric Verrone, the president of the Writers Guild of America, West, which recently ended a 100-day strike that virtually paralyzed television production. The Internet was a valuable organizing tool for the writers, he said in an interview.

"When your employers are the same companies that control the media, it's hard to get your message out," Verrone said.

To maintain contact with one another, guild members used blog postings, e-mail and videos. It was the success of that campaign that prompted Verrone to come to Washington and push for legislation that he hopes will guarantee the Internet's status as an open forum for communication.

Verrone, a television writer and producer for over 20 years, supports legislation proposed by Sens. Olympia Snowe, R-Maine, and Byron Dorgan, D-N.D., that would force those who control Internet service to treat all traffic equally.

Large network owners like cable and telecommunications companies are opposed to network neutrality legislation, saying it would add a layer of regulation that will hurt consumers. They say it is unnecessary and amounts to a solution in search of a problem.

Kyle McSlarrow, president and CEO of the National Cable and Telecommunications Association, described the picture painted by pro-net neutrality commenters as "a complete fantasy."

McSlarrow said of the tens of millions of people who use the Internet every day, "no one is being blocked" and if they were, they could go to another competitor.

Verrone wants Washington to ensure that the owners of the information pipelines in the U.S. do not interfere with the free exchange of ideas.

"The only thing bigger than corporations in this country is the government," he said. "So we think we have to make clear to legislators that we need somebody making sure that that pipe is neutral."