In 1997 he was fined $52,500 (the largest such fine in Washington State history) for illegally contributing money to political candidates, much of it in the names of his employees.

Onyango illegally contributed money to Obama's 2008 presidential campaign.

Last June, the FBI told six members of Congress that the Chinese government intended to illegally contribute money to their campaigns.

In September, a Texas grand jury indicted the company on charges of illegally contributing money during 2002 to a political action committee created by Mr. DeLay.

Congressional committees and the Justice Department are investigating whether the Chinese Government illegally contributed money to the Democrats during Mr. Clinton's re-election campaign.

By 1976, prosecutors had convicted 18 American corporations of contributing illegally to Nixon's campaign.

In 1976, he was convicted of illegally contributing $54,000 to President Richard M. Nixon's 1972 campaign, though he was later pardoned.

It recognized as law that pornography could illegally contribute to sexual harassment through a workplace environment hostile to women.

But Democrats are calling for him to withdraw and are threatening to file a complaint against the Republicans, charging that they contributed illegally to the Nader campaign.

Another charge still outstanding says that in 1972, Mr. Vesco illegally contributed $200,000 to President Richard M. Nixon's re-election fund.