A tweet from Lynn Bartels of the Secretary of State's office shows former Aurora city councilman Ryan Frazier submitting petition signatures for his U.S. Senate candidacy.

AURORA | Former Aurora city councilman Ryan Frazier was the fourth and final Republican candidate to deliver petition signatures for the 2016 U.S. Senate primary, submitting them Monday afternoon, April 4.

A tweet from Lynn Bartels of the Secretary of State's office shows former Aurora city councilman Ryan Frazier submitting petition signatures for his U.S. Senate candidacy.
A tweet from Lynn Bartels of the Secretary of State’s office shows former Aurora city councilman Ryan Frazier submitting petition signatures for his U.S. Senate candidacy.
A tweet from Lynn Bartels of the Secretary of State’s office shows former Aurora city councilman Ryan Frazier submitting petition signatures for his U.S. Senate candidacy.

Frazier’s petition signature submission was announced first by Lynn Bartels, spokeswoman for the Secretary of State’s office.

Monday was the deadline for all major and minor-party candidates to submit petition signatures for the primary ballot in June.

Frazier joined former state Rep. Jon Keyser, former Colorado State University athletic director Jack Graham and Colorado Springs businessman Robert Blaha as candidates seeking to petition onto the primary ballot.

Frazier last ran for office in 2011, when he unsuccessfully ran for Aurora mayor. He also previously mounted an unsuccessful bid for Congress in 2010 against U.S. Rep. Ed Perlmutter, D-Golden. Since then, he served as an on-air political commentator for 9News in Denver.

Other than collecting signatures, the only other way a candidate can earn a spot on the primary ballot is by receiving at least 30 percent of the delegate votes cast at a party assembly. The Colorado Republican Committee convention is slated to take place April 9 in Colorado Springs.

The winner of the Republican primary will face incumbent Democratic Sen. Michael Bennet in the November general election.