A Republican congressman has contributed another $200,000 to the campaign to recall Gray Davis (search), the Democrat he wants to replace as governor.

Rep. Darrell Issa (search) now has given $645,000 of the approximately $1 million raised by recall supporters. The money officially comes from Greene Properties Inc. of Vista, a company owned by Issa and his wife.

Records posted on the California secretary of state's Web site Monday revealed the latest contribution.

Taxpayers Against the Recall (search) have raised about $500,000, including $100,000 reported Monday from Zenith Insurance Co. of Woodland Hills, a major provider of workers' compensation insurance. Zenith Chairman Stanley Zax is also a longtime Davis supporter.

Recall backers must collect nearly 900,000 valid signatures by Sept. 2 to get the measure on the ballot. On Monday, they claimed to have collected 587,000 and said they expected to reach the required number in July, which could result in a special election in the fall.

Taxpayers Against the Recall said Monday they've collected some 200,000 signatures on petitions opposing the recall.