The Bush family’s sour grapes continue to poison the campaign trail.

The dynastic clan cannot accept defeat at the hands of Donald Trump, and they are doing everything in their power to undermine his campaign.

And Jeb Bush just added fuel to that fire.

At a Manhattan Institute event, he reportedly told one attendee he was voting for Libertarian Party nominee Gary Johnson.

The New York Daily News reports:

“The former Florida governor repeatedly suggested voting for Libertarian Party nominee Gary Johnson at a private luncheon on Wednesday, those present tell the Daily News, seemingly going further than his previous comments that he’d consider voting for Johnson.

Bush joked about “President Johnson” during a lunch focused on education reform that was hosted by the Manhattan Institute, and in a private conversation before his speech strongly recommended another person present should vote for the gaffe-prone Libertarian nominee.

“There was an old man talking to Jeb across the table and said, ‘I can’t bring myself to vote for Hillary and Trump,’ and Jeb looked at him and mouthed the word ‘Johnson,’ silently,” one person within earshot of the two told the Daily News.

The person also said the former GOP presidential candidate joked about Johnson becoming president during his speech, comments the Daily News verified by obtaining audio of Bush’s remarks.

“If I did get a call several weeks after the election, what would I tell President Johnson — I mean, President whoever?” Bush said to laughs during the speech.”

While it’s not for Jeb to say he won’t vote for Trump, an endorsement of Gary Johnson is a development.

In addition to Jeb, George H.W. Bush has also reportedly told people he is voting for Hillary Clinton.

Reports surfaced after a [1,000] Points of Light charity event that he informed at least one guest he planned to vote for Hillary Clinton.

And some critics argue the Bush family is engaging in a childlike “I’m going to take my ball and go home” temper tantrum.

When George H.W. Bush and George W. Bush ran for president, they were hardly the darlings of the conservative grassroots.

But family surrogates and conservative elites loyal to the family, and on the payroll, pushed party unity.

Had Jeb won the race, critics argue the Bush family would be demanding conservatives overlook his support for amnesty, Common Core and a war-mongering foreign policy and support the party nominee.

Some argue the family is disrespecting the voters who turned out in the primaries and decided Donald Trump was their candidate.

While Trump did thrash Jeb in the primaries – tagging him with the nickname “Low Energy” and running against amnesty, Common Core and the war in Iraq – some believe what also is motivating the Bush family’s diss of Trump is a fear of losing control over the Republican Party.

For a generation, the Bush family’s policy of mass immigration, globalist trade deals and interventionist foreign policy have reigned supreme in the GOP.

They have set the policy agenda that Republicans have sought to implement.

But a Trump victory would mean his America First policies would shape the direction of the GOP.

And that does not appear to be something the Bush family can live with.

Many have argued over the years the Bushes are really liberals.

Working to elect Hillary Clinton – despite her proposals running in sharp conflict with the conservative principles the Bushes claim to hold – only confirms this suspicion.