Sen. Kyrsten Sinema said she will be leaving the U.S. Senate "at the end of this year," but didn't say when. "I think she was looking at the same polling number as we all were, which showed a very, very unlikely path to victory," said Samara Klar, a political science professor at the University of Arizona. Arizona political consultant, Chuck Coughlin, says it’s a win for Gallego and his campaign. "Today it was Ruben Gallego’s Super Tuesday. I think the Democrats and Gallego will be celebrating this fact tonight, that they can go embrace those voters and market themselves to those voters that are Democrats," Coughlin said. Sinema was known to be a key player in negotiating bipartisan bills. "The back was fractured by the time she decided to pull the trigger to run as an Independent. But, maybe the camel's back on the other side was the immigration stuff," Coughlin remarked. A bill that failed. Coughlin says it would be hard to see Sinema backing either Lake or Gallego, but does not believe we’ve seen the last of Sinema this political season. "She has a following in the state. There is a significant number of people and folks who support her in the state. I believe we will hear more from her probably in this election cycle about what she thinks and that will be interesting to see how that plays out," he said. Subscribe to FOX 10 Phoenix! https://www.youtube.com/channel/UCNjfNLnQYbjBEvnS8KFuyGQ?sub_confirmation=1 #fox10phoenix FOX 10 Phoenix delivers breaking news, live events, politics, entertainment, business news and local stories from Phoenix, Arizona and across the nation. Watch more FOX 10 Phoenix on YouTube: Arizona headlines: https://youtube.com/playlist?list=PLjk-Nxa5HqPtshEuaekDdk3dtuBkjdJbJ National headlines: https://www.youtube.com/playlist?list=PLjk-Nxa5HqPtq-kkrH0cQ3ZIYpLj5MGVT Raw footage: https://www.youtube.com/playlist?list=PLjk-Nxa5HqPt6sLbUHtU-fjr-RTh8O_ct