Mississippi’s bruising GOP Senate primary, which voters will decide Tuesday in a runoff, has come at great cost — more than $17 million — to Republicans.
More than 30 Republican-friendly outside groups, from Club for Growth Action to the U.S. Chamber of Commerce, have lavished in excess of $11.3 million on the race, according to the Center for Responsive Politics. That’s almost twice the $6.1 million spent by Sen. Thad Cochran and his tea party challenger, state Sen. Chris McDaniel.