MSNBC concedes that many Democrats are already considering jumping into what will certainly become a messy primary:
Her retirement is the first major shakeup in years of California Democratic politics, which has been dominated by the same crop of leaders for decades. It sets up what is sure to be a wild blockbuster of race — a slate of ambitious Democrats will likely be vying against each other for the first shot at an open Senate seat in the country’s most populous state since the beginning of the Clinton era. … “I can see it getting very dirty,” said Karl Frisch, a California native who worked for the state party and the Democratic Senatorial Campaign Committee before joining the public relations firm Bullfight Strategies in Washington D.C.
This cluttered primary isn’t the only one worrying Democrats. Maryland, Ohio, and Florida are also problems for them.