WASHINGTON - Wyoming congressional candidate Mark Gordon has given his campaign almost $648,000 in his quest to become the Republican nominee for the U.S. House this year.

Gordon is one of several Republicans running to replace U.S. Rep. Barbara Cubin, a Republican who is retiring this year. Gordon's campaign says he has raised more than $828,000, including the money he gave his campaign.

The rancher from Johnson County said that he would not have asked others to invest in his campaign unless he had invested in it as well.

"I care deeply about Wyoming and its people, but the sad reality is that modern campaigns are very expensive," he said.

One of the Republicans running against Gordon in the Aug. 19 primary is Cynthia Lummis, a former Wyoming state treasurer. She raised a total of around $370,000, including $67,000 she donated to her own campaign.

Also running in the Republican primary is retired U.S. Navy officer Bill Winney, who had not yet submitted his campaign finance information to the Federal Election Commission and did not return a call seeking the numbers. Winney had raised a total of $5,650 as of March 31.

The only Democrat in the race is Wilson businessman Gary Trauner, who narrowly lost to Cubin two years ago by about 1,000 votes. He has raised more than any of the Republicans, with a total of $990,000 in donations, including more than $320,000 raised between April and the end of June. He has not given any of his own money to the campaign.

Wyoming's two senators, both up for election this year, have reported nearly even fundraising. Republican Mike Enzi has raised $1.8 million since he was last re-elected in 2002, and Republican John Barrasso has raised $1.9 million since he was appointed to the seat by Gov. Dave Freudenthal in 2007 after the death of Sen. Craig Thomas.

Barrasso is running this year to complete Thomas's full term. His Democratic opponents, Gillette attorney Nick Carter and former state Sen. Keith Goodenough, have not come close to his fundraising.

Carter has raised a total of around $111,000. Goodenough has not raised the $5,000 necessary to file a report with the Federal Election Commission.

Chris Rothfuss, a Democrat challenging Enzi, did not respond to a request for his fundraising information.