Washington - Rep. Charles Rangel said Friday he won't step down as chairman of the powerful House tax-writing committee after being admonished by an ethics panel for accepting corporate-sponsored trips to the Caribbean. The public rebuke of one of the Democrats' most outspoken leaders posed more woes for a party that had vowed to end a "culture of corruption."

The House ethics committee said that aides to the 20-term New York Democrat tried at least three times to show him the trips - to Antigua in 2007 and St. Maarten in 2008 - had corporate sponsorship, a violation of congressional gift rules.

The chairman of the House Ways and Means Committee claimed that Friday's report by the ethics panel "exonerates me" because it cites no evidence that he knew the trips were sponsored by corporations.

Rangel denied to investigators that he saw any of the written communications from staff members.

The report said investigators could not determine whether Rangel saw two staff memos to him mentioning corporate sponsorship in 2008 and a letter addressed to him in 2007.

House Speaker Nancy Pelosi, noting that multiple ethics complaints remain pending against Rangel, declined to say whether he should stay on the job. "We'll just see what happens next," Pelosi, D-Calif., told reporters.

In addition to the trips, Rangel still faces potentially more serious allegations, including failing to disclose rental income on a villa in the Dominican Republic, use of his congressional office to raise money for a college center in his name and belated financial disclosure of hundreds of thousands of dollars in previously unreported wealth.

The latest ethics controversy presents a setback to Pelosi, who had promised to "drain the swamp" of ethics abuses as part of the Democratic campaign to win back the House in 2006.