Democrats are assured of maintaining their majority in the Iowa Senate, with one race headed for a recount and another to be decided in a December 11 special election.

Many candidates for the Iowa House and Senate tout endorsements by outside groups in their campaign communications. Some of those groups pay for direct mail, phone calls, or even advertising supporting their endorsed candidates.

Iowa’s influential political action committees and advocacy groups have very different ways of getting involved in the state legislative campaign. Follow me after the jump for examples of four distinct strategies.

In a surprising turn of events, Republican challengers are putting an obscure vote on water bottles at the center of their attacks on Iowa Senate Democrats. Follow me after the jump for background on this year’s equivalent to the non-existent “heated sidewalks” of 2010.