Angry at Ted Cruz, Republicans should remember what he represents

Republicans have a good chance to win control of the Senate this November. Democrats are on the defensive over Obamacare, the president is unpopular, and history suggests second-term mid-terms are nearly always unlucky for the White House.

Given that, why is there so much division, backbiting, and bad blood among some Senate Republicans? Last seen during the government shutdown fiasco, the GOP malady returned this week with a debt ceiling mini-fiasco, and it threatens to revisit the Senate any number of times before Election Day.