Weiner owns New York Times' assets valued between $1,001 and $15,000, according to his 2009 personal financial disclosure report, the most recent available. (Members are only required to list the value of their assets in broad ranges.) The Times has been reporting on the congressman's scandal with multiple stories and blog posts each day.

Many members of Congress and editorial boards of news organizations have also asked Weiner to step down.

And although the Times has not shown its support for Weiner in any way, congressmen's interest in media investments should be questioned, said Kevin Smith, chairman of the ethics committee for the Society of Professional Journalists.

"If congressmen are investing in the New York Times, does that filter into the newsroom?," Smith told OpenSecrets Blog. "What happens is that it does raise red flags."

Edwards, a former senator and presidential candidate who was recently indicted on six counts of campaign finance violations, may also still have holdings in media companies.

Edwards has previously reported investments in Comcast and Viacom, two of the biggest media conglomerates, according to his 2004 disclosure report from his time as a U.S. senator. He also disclosed holdings in GateHouse Media, which owns nearly 500 publications nationwide, when he announced his presidential bid during the 2008 election cycle.

Gannett Co., Walt Disney (which owns ABC), News Corp., CBS, Washington Post, Thomas Reuters and E.W. Scripps Co. are some of the other news organizations in which members of Congress invest.

Robin Pence, spokeswoman for Gannett, which owns 82 newspapers (including USA Today) and 23 television stations, told OpenSecrets Blog in an email that the company has never looked into whether any members of Congress hold the company's stock.

"But even if they did, it would have no impact on our news coverage," Pence said.

Almost an equal number of Democrats and Republicans either directly or through their spouses hold investments in media organizations.

They include Kerry, Richard Burr (R-N.C.), Tom Harkin (D-Iowa), Kay Hagan (D-N.C.), Sheldon Whitehouse (D-R.I.), Jon Kyl (R-Ariz.) and Reps. Eric Cantor (R-Va.), Nancy Pelosi (D-Calif.), Rick Berg (R-N.D.) and James Renacci (R-Ohio).

Six of the total 60 members of Congress with such stock holdings belong to the Lone Star state. Reps. Michael McCaul (R-Texas), Kenny Marchant (R-Texas),  Michael Burgess (R-Texas), Lloyd Doggett (D-Texas), William Flores (R-Texas) and Blake Farenthold (R-Texas) each have thousands invested in media companies.

Smith told OpenSecrets Blog that such investments could be problematic depending on the congressmen's motives --  are they politically strategic or financially strategic decisions?
And with such a large number of politicians having holdings in the media, questions behind their motives will undoubtedly be raised.

"Either they are all going to the same investment strategist, or they have some sort of game plan," Smith said.

OpenSecrets Blog contacted the offices of more than a dozen politicians who reported owning stock in media companies. Many did not return messages, and some stated that they were not allowed to comment on their congressmen's personal investments.

Whitney Smith, spokeswoman for Kerry, who reported investments in News Corp., Comcast, Walt Disney and E.W. Scripps, told OpenSecrets Blog in an email that the senator himself did not personally purchase media stocks.

"All of his holdings are in inherited family trusts that he has no investing control over whatsoever, nor is Senator Kerry a beneficiary of any of his wife's trusts," Whitney Smith said.

For the purposes of this analysis, investments in certain large conglomerates, such as General Electric, which partially own certain media organizations, were not included. The research is also based on congressmen's filings from 2009, meaning that some of them may no longer own the stock in question. 

Members of Congress are scheduled to report their 2010 personal finances today, although many members typically file for extensions, meaning their information won't be available for weeks or months.

Below is a list of congressional members' media investments, according to the Center's analysis of their most recent personal financial disclosures:

Center for Responsive Politics senior researcher Dan Auble contributed to this report.