Colorado Republicans will choose among five U.S. Senate hopefuls next month.

A Denver district court judge on Wednesday ruled that Aurora businessman Ryan Frazier collected enough voter signatures to qualify for the June 28 primary.

Frazier joins businessmen Robert Blaha and Jack Graham, former state Rep. Jon Keyser and El Paso County Commissioner Darryl Glenn on the ballot. All want to unseat Democratic Sen. Michael Bennet this November.

Frazier, Blaha and Keyser went to court to overturn findings by Secretary of State Wayne Williams that they didn't collect enough signatures to qualify.