The Democrats failed to reach 60 seats in the Senate this election. Might they pass the threshold in 2010? It’s too early to say, considering Barack Obama has not yet even assumed office, but after George Voinovich became the fourth Republican senator to announce plans to retire today, the Democrats are hopeful. In addition to Voinovich’s Ohio seat, Floridian Mel Martinez, Kansan Sam Brownback, and Missourian Kit Bond are retiring. "You know Republicans are in trouble when respected senators like Voinovich are retiring while people like [Sen. David] Vitter (R-La.) are running again," said a Democratic Senatorial Campaign Committee spokesman.