By Nancy Colasurdo I couldn’t quite put my finger on why I felt such relief at seeing Tammy Murphy’s announcement suspending her campaign to run for Senate on Sunday. Up to this point, I was only lightly invested in that race, dipping in and out of the news to keep up. And then when I watched her video, I realized what the feeling was – a sort of bliss at not having to take a stand on one more thing. “It is clear to me that continuing in this race will involve waging a very divisive and negative campaign, which I am not willing to do,” Murphy says in the video. “And with Donald Trump on the ba…