Two-thirds of Republicans and Republican-leaning independents said they want their member of Congress to “keep their promises and stick to principles” as opposed to “compromise in a bipartisan way to get things done.” “From Obamacare on down, sticking to principle is where the Republican base is today,” said David Kirby, vice president of opinion research at FreedomWorks. “It’s an example of how off the Republican establishment is from their base.” Social issues have become less salient to GOP voters: 41 percent said gay marriage is not one of their top 10 issues. Asked about abortion, about one-third said it is...