David Perdue and Jack Kingston will have a runoff in Georgia 's GOP Senate primary . Ugly and expensive race . In Oregon , Sen. Jeff Merkley , Dr. Monica Wehby win Democratic , GOP Senate primaries . And in Montana, Rep. Ryan Zinke won the Republican nomination for U.S. House of Representatives. Republican Sen. Mitch McConnell faces Democrat Alison Lundergan Grimes .
David Perdue and Jack Kingston will have a runoff in Georgia 's GOP Senate primary . In Oregon , Sen. Jeff Merkley , Dr. Monica Wehby win Democratic , GOP Senate primaries . And in Montana, Rep. Ryan Zinke won the Republican nomination for U.S. House of Representatives. Republican Sen. Mitch McConnell faces Democrat Alison Lundergan Grimes .