The hottest hand in Republican primary politics so far belongs to none other than Romney, the 2012 Republican presidential loser who seemed to struggle every day of the presidential contest to find a path to victory but has picked nothing but winners in 2014. Of the candidates he’s endorsed so far in contested GOP primaries, all six have won their races. Included on that list are North Carolina Senate hopeful Thom Tillis, Oregon Senate candidate Dr. Monica Wehby, Idaho Rep. Mike Simpson, and Pennsylvania Rep. Bud Shuster, veteran and novice candidates alike who all faced bruising, expensive primary battles…

Many of Romney’s endorsees also got the nod from the U.S. Chamber of Commerce, which, like Romney, is undefeated so far in the midterm election cycle. Of the eight candidates the chamber has supported this year, all have won their primaries or special elections.

But unlike an endorsement from Romney or any other politician, which might bring a few days of press and a bump in the polls of a point or so, the support of the chamber means money and lots of it, in the form of independent expenditures to support a candidate. In addition to Tillis and Simpson, the chamber went two for two in special elections in Alabama and Florida, and this month spent more than $1 million backing Sen. Mitch McConnell against Tea Party favorite Matt Bevin, along with more than $900,000 for Rep. Jack Kingston, who made it out of a five-way Republican brawl into the runoff in the Georgia GOP senate primary.