There’s another candidate for U.S. Senate. Former astronaut Mark Kelly announced through a video that he is running for the Senate seat, currently occupied by Martha McSally. Kelly is running as a Democrat and is the husband of former Arizona Congresswoman Gabby Giffords. He had been mulling a run for Senate for some time. McSally is finishing out the term of the late Senator John McCain, who passed away last year from a long battle with cancer. McSally was appointed to the seat earlier this year by Governor Doug Ducey.