Sen. Mitt Romney’s (R-UT) decision not to endorse Sen. Mike Lee’s (R-UT) reelection bid has infuriated Senate Republicans and conservative activists. Romney, Utah’s junior senator, has declined — and even refused — to endorse Lee’s reelection bid. Lee is the senior senator from Utah. Senate Republicans are becoming increasingly alarmed by the decision, noting that even though Senate Republicans may have their differences on policy, they typically stand united against Republican opponents. “I respect [Romney], and I understand that each state has its own dynamics, but I do not understand why he is remaining neutral,” one Republican senator said anonymously....