I honestly have wondered the same thing.
He's presented himself very well and if the Rats won't forgo the filibuster and let him be confirmed I think he will be by the nuclear option.
I think the rats know that too.
I have no doubt it’s gonna take the nuclear option. The Rats will use the “under the cloud of an investigation” as cover. I won’t be surprised if Comey doesn’t drop another bond to delay the vote. He does sound a little to much like Roberts for comfort.