The major-party filing deadlines to run for elected office in three states have passed. The deadlines in both Arizona and North Dakota were on April 6; the deadline in Oklahoma was on April 10.

In Arizona, candidates filed for the following congressional offices:
• One U.S. Senate seat. A special election is being held to fill the Senate seat vacated by John McCain (R) upon his death on August 25, 2018. The current appointed incumbent, Martha McSally (R), filed for election to the seat. The winner of the special election will serve the remaining two years of McCain’s term.
• Nine U.S. House seats. All nine incumbents filed for re-election.

In North Dakota, candidates filed for the following congressional office:
• One U.S. House seat. The incumbent, Kelly Armstrong (R), filed for re-election.

In Oklahoma, candidates filed for the following congressional offices:
• One U.S. Senate seat. The incumbent, Jim Inhofe (R), filed for re-election.
• Five U.S. House seats. All five incumbents filed for re-election.

North Dakota’s primary is scheduled for June 9, Oklahoma’s primary is scheduled for June 30, and Arizona’s primary is scheduled for August 4. The general elections in all three states are scheduled for November 3, 2020.

Arizona’s and North Dakota’s filing deadlines were the 32nd and 33rd to take place in the 2020 election cycle; Oklahoma’s deadline is the 34th. The next statewide filing deadline is on April 21 in Michigan.

Additional reading:
United States special election in Arizona, 2020
United States House of Representatives elections in Arizona, 2020
United States House of Representatives election in North Dakota, 2020
United States Senate election in Oklahoma, 2020
United States House of Representatives elections in Oklahoma, 2020