Senate Minority LeaderMitch McConnell said on Tuesday that it was possible that the Republican Party could lose the elections if they field candidates that are not acceptable.
Speaking at an event hosted by the Kentucky Chamber of Commerce on Tuesday, McConnell said that the GOP's chances of wresting back control in the Senate were good.
McConnell said that the 1994 elections were the best year the Republicans had seen, and that the atmosphere is better than it was in 1994.
It is a perfect storm of problems for the Democrats because they are an entirely Democratic government, McConnell said. We had experience with that in the past.
If you look at where we have to compete in order to get into a majority, there are places that are competitive in the general election.
He said that in the past there had been instances of "bizarre people" who got through the primary elections but whose chances of winning seats faded by the fall.
McConnell highlighted states like Georgia, Arizona, Missouri, Nevada, and Pennsylvania as places where fully electable nominees will be found.
He said that having fully-electable nominees is critical from the Senate.
The GOP currently holds the minority in the Senate, but needs one more seat to get the majority.
McConnell didn't say who he thought would be unacceptable as a Senate candidate. Mehmet Oz, better known as Dr. Oz, was endorsed by former President Trump in his race to become a Pennsylvania senator.
Pennsylvania Senate candidate Sean Parnell and Missouri Senate candidate Eric Greitens have had scandal-plagued runs. After facing domestic abuse allegations from his estranged wife, Parnell suspended his campaign, while Greitens is currently fighting allegations of physical abuse made by his ex-wife.
In February, the New York Times reported that McConnell was working behind the scenes to make sure that some candidates who supported Trump did not win their Senate primaries.