U.S. Rep. Cory Gardner is proposing that women be allowed to buy birth control pills without a prescription.
Gardner made the suggestion Thursday after being criticized by Democrats on women's rights.
Gardner, a Republican, is challenging Democratic Sen. Mark Udall in the November election.
Udall aired an ad this week accusing Gardner of wanting to ban birth control because he backed a measure to give legal rights to fertilized eggs. Planned Parenthood also hit Gardner on the issue in an ad Thursday.
Gardner has since disavowed the so-called personhood proposal. In a piece for the Denver Post, he said it would be safer and cheaper if the pill was available over the counter.
Gardner and Udall are competing for the votes of a small number of suburban women who often decide statewide Colorado elections.