The mastermind of the George Washington Bridge lane closings “was angry” that NJ Gov. Chris Christie left him holding the bag, a confidant of the governor testified in the Bridgegate trial Friday.

Star Bridgegate canary David Wildstein hit the roof when the governor assured the public — at a press conference three months after the politically-vindictive lane shut-downs — that no one in his administration knew about the Sept. 2013 plot to punish Fort Lee’s mayor.

Wildstein has told the trial’s federal jury in Newark that while he masterminded the lane closings, top administration staffers were also in on the plot — and on Friday, a Republican strategist testified that Wildstein did not appreciate the governor shifting blame downwards.

“For whatever reason the governor said nobody in his administration knew,” said Republican strategist Michael DuHaime.

“He (Wildstein) believed that to be untrue and he was angry about it,” DuHaime told the jury.

Wildstein made the complaints to DuHaime over the phone the day after the Dec. 13th press conference, he said.

The feds allege in the ongoing trial that former Christie aide Bridget Anne Kelly and ex-Port Authority executive Bill Baroni conspired to help Wildstein carry out the lane closures, which they claimed were part of a traffic study.

DuHaime is the third person at the trial to say he warned Christie that his staff may have been in on the lane closures before the Dec. 13th press conference.

In his testimony Friday, DuHaime said he was asked the day of the press conference to check with Wildstein about whether there were emails and text messages showing that Kelly knew about the lane closures before they had happened.

DuHaime said the request came from Bill Stepien, another Christie staffer who Wildstein has said knew about the lane closures before they happened.

DuHaime said that when he called Wildstein the morning of the presser, Wildstein told him there were emails and text messages.

The defense showed DuHaime phone records showing he then had a 5 minute conversation with Gov. Christie, just minutes before his Dec, 13th press conference.

But DuHaime denied remembering whether he relayed this vital information to the governor.

“I don’t recall if I passed the information about the emails to the governor,” he said.

DuHaime also said he told the Gov. after the press conference that Wildstein was mad about his denying staff involvement.

“Did you tell him Wildstein was mad because no one is taking responsibility,” Kelly’s lawyer Critchley asked.

“I did at one point in these conversations, yes,” DuHaime said of their numerous calls that day.

“What did he say?”

“I don’t recall,” DuHaime said. “He was, I think, taken aback by David’s being upset.”