Three Republican senators who support same - sex marriage are up for re-election in 2016, but though all three face primary challenges, they are betting it won't hurt their chances. (rollcall.com)
The two sides would also have to refrain from participating in primary challenges against incumbent senators. (dcnydems.org)
He hasn't been showing up at multiple Democratic club endorsements meetings, including some that supported him when he faced serious primary challenges in the past. (observer.com)