In 2004 she ran against Republican incumbent U.S. Congressman Jim Ryun in Kansas' Second District. Boyda criticized Ryun's support for school vouchers and his lack of support for public schools. She said she had left the Republican Party because it had become too conservative. Ryun criticized her for taking part in protests against the Iraq War. Boyda spent $1.1 million on her campaign, $300,000 of it her own money. Ryun spent $1.2 million. George W. Bush carried the district 59%-39% and Ryun defeated Boyda 56%-41%. The only county Boyda had won during the election was Crawford.