Clinton Campaign Manager Robby Mook continues to appear on the media circuit and not answer questions. In an “interview” with CNN’s Jake Tapper on Sunday morning, Mook spent more time fiddling with his earpiece than providing substantive answers.

Tapper first asked Mook for some information into Clinton’s debate prep and wondered whether her campaign is prepared for the possibility of Gennifer Flowers to sit in the audience. Mook used that question to try and prove Trump is unfit to be president.

The fact that Trump is “spending hours” before the debate bringing up President Bill Clinton’s old scandals “shows what kind of leader he’d be,” Mook said.

“It’s a warning sign before the debate has even started."

Mook added he’s concerned Trump will be “graded on a curve” during the debate, noting that he may get a positive review just because he doesn’t fly off handle.

Tapper then questioned Mook about the recent Clinton email dump. One email in particular showed an IT aide referencing the “Hillary coverup operation.”

“What’s the Hillary coverup operation?” Tapper wondered.

“The Republicans are selectively leaking documents to make Hillary look bad,” Mook responded.

The FBI conducted a comprehensive, deep investigation into Clinton’s use of a private server and concluded it did not justify grounds for indictment, he reminded Tapper. He said the public would be better served to trust the career professionals who could not find a criminal case against Clinton.

Tapper also tried to get Mook to tell voters whether or not Clinton supports sanctuary cities, to no avail.

“That’s too narrow a view,” Mook said. “We need comprehensive immigration reform.”