Already under investigation by the House ethics committee for various tax-related issues, Rep. Charles Rangel (D-N.Y.) could face increased scrutiny from the panel after new reports of discrepancies in his financial disclosure forms.

The committee had already needed to expand its investigation in December after more ethics issues surfaced -- specifically, that he allegedly helped obtain a tax loophole for a donor to the Charles B. Rangel Center at the City College of New York.

The new report comes from Sunlight Foundation, which released its finding yesterday that Rangel had "failed to report purchases, sales or his ownership of assets at least 28 times since 1978 on his personal financial disclosure forms."

"Assets worth between $239,026 and $831,000 appeared and disappeared with no disclosure of when they were acquired, how long they were held, or when they were sold, as House Rules require," the group reported. Sunlight is a private, nonpartisan watchdog group.

The New York Times reported yesterday that "Mr. Rangel's spokesman, Emil Milne, said the congressman had already acknowledged the errors and was seeking to correct them."

Rep. John Carter (R-Texas) has introduced a resolution that would remove Rangel from his post as chairman of the tax-writing Ways and Means Committee, pending completion of the ethics committee investigation.

"If Mr. Rangel is cleared of wrongdoing, I will be the first to congratulate him back to the Chairmanship," Carter said in a press release. "But we must show we are serious about enforcing the ethics rules of this House, instead of using stall tactics to thwart the process."