(KJZZ file photos)

Ann Kirkpatrick and John McCain

U.S. Rep. Ann Kirkpatrick has decided to jump into the 2016 Senate race to challenge incumbent Sen. John McCain — presuming McCain defeats any GOP primary opponents.

So should Democrats be excited about Kirkpatrick? And should McCain be worried? We asked Arizona Democratic Party Chairwoman Alexis Tameron, Catherine Alonzo of the public-affairs firm Javelina and Bob Robb of the Arizona Republic.