It looks like Senate Majority Leader Mitch McConnell, R-Ky., will have enough votes to confirm Supreme Court nominee Brett Kavanaugh this weekend.

Two key Senate holdouts, Republican Sens. Jeff Flake, R-Ariz., and Susan Collins, R-Maine, told reporters Thursday that they’re encouraged by the FBI’s supplemental investigation into the allegations against the judge.

"It appears to be a very thorough investigation," the Maine senator told CNN’s Jeremy Herb, adding that she plans to read the full report later.

Flake said elsewhere that he has seen "no additional corroborating information” in the report showing Kavanaugh sexually assaulted women when he was in high school or college.

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The Arizona senator announced last Friday he would vote on the Senate Judiciary Committee to advance Kavanaugh’s nomination to the full U.S. Senate, but would only support him on the floor if GOP leadership agreed to delay the final confirmation vote for up to one week to give the FBI time to investigate uncorroborated allegations the Supreme Court nominee sexually assaulted women in his youth.

GOP leaders agreed, and the White House got on board, instructing the FBI to reopen its previous background investigations of Kavanaugh.

On Thursday, Democratic lawmakers charged the FBI with failing to perform a thorough enough supplemental investigation. They say the report should include more details regarding allegations Kavanaugh drank to excess when he was a teen. They are also crying foul that the FBI didn’t bother to interview people claiming to have hearsay knowledge of supposedly scandalous behavior by Kavanaugh.

But in terms of whether McConnell can get Kavanaugh confirmed, it doesn’t really matter if Democratic lawmakers are satisfied with the investigation. What matters for the Senate majority leader is that he can get at least two of his previously wavering caucus members to vote in Kavanaugh’s favor.

The U.S. Senate is is currently 51-49 in the GOP’s favor. McConnell doesn’t need a single Democrat to get Kavanaugh over the line. But he does need at least two of three GOP holdouts, who include Flake, Collins, and Sen. Lisa Murkowski, R-Alaska. If one of the three defects and votes “nay,” McConnell will still win with Vice President Mike Pence casting the tiebreaking vote. But McConnell cannot afford to lose two Republicans unless he can win over Democratic votes.