In 2010, Christine O'Donnell famously defeated then-Rep. Mike Castle, R-Del., in the GOP Senate primary — then lost the general election to now-Sen. Chris Coons, a Democrat. (See "I'm not a witch... I'm you.") Her candidacy serves as a symbol of that cycle, in which three tea-party-backed GOP nominees lost otherwise winnable races to Democrats in Delaware, Nevada and Colorado. O'Donnell is taking care of her family and will make a decision later about possibly running against Coons again in 2014, Abby Livingston reports in the Farm Team column, Roll Call's weekly state-by-state look at up-and-coming candidates. (more…)