Washington CNN —Sen. Bernie Sanders of Vermont said Sunday that “political aspirations” drove Sen. Kyrsten Sinema’s exit from the Democratic Party, as he vowed to take a “hard look” at supporting a potential Democratic challenge to her in Arizona. I happen to suspect that it’s probably a lot to do with politics back in Arizona. Sinema announced last week she was leaving the Democratic Party and registering as a political independent, a move that is unlikely to change the power balance in the next Senate. Democrats will have a narrow 51-49 majority that includes two independents who caucus with them: Sanders and Angus King of Maine. She also brushed aside criticism she may face for the decision to leave the Democratic Party.

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