By Mike Sunnucks | Phoenix Business Journal
U.S. Rep. Kyrsten Sinema, D-Ariz., has announced she is running for the U.S. Senate in 2018.
The seat is currently held by U.S. Sen. Jeff Flake, R-Ariz., who faces a challenge from Kelli Ward in the Republican primary.
Here are some of the key and interesting facts around the Senate race which also includes a primary contests: