Although Donald Trump is now the presumptive Republican nominee, failed 2012 presidential candidate Mitt Romney is still firing pot shots.

Romney is viewed as the leader of the continually diminishing #NeverTrump movement, which failed to stop Trump during the primaries and whose effort to recruit an independent candidate to run in the general election fizzled.

But Romney’s attacks have not gone unanswered and the latest responses from Trump and his campaign summed up many conservatives’ attitude toward Romney.

Speaking at the retreat he hosts yearly for his extensive donor network, Romney blasted the 16 Republicans who Trump defeated along the way to clinching the Republican nomination.

Politico reports:

“Their biggest failure was attacking each other and not the front-runner,” Romney said. “Just politically, I thought that move was not right for them.”

 Romney reserved particular scorn for Texas Sen. Ted Cruz, who Romney endorsed late in the primary process. The Texas Senator, he pointed out, spent extensive time during the campaign praising Trump. He also said Ohio Gov. John Kasich had divided the anti-Trump vote by remaining in the race long after it had become clear he didn’t have a realistic pathway to the nomination — a message he said he had relayed personally to the Ohio governor. And Romney chided Right to Rise, the $100 million-plus Jeb Bush Super PAC that spent heavily to tear down Bush rivals other than Trump.

 “I thought it was an extremely large mistake on their part,” he said of the Super PAC.

 Both Trump and his Campaign Chairman responded.

Trump fired back via Twitter.

And Trump’s Campaign Chairman, Paul Manafort, blasted Romney as a coward in an interview with ABC’s George Stephanopoulos.

Politico reports:

“Romney wanted to run, chose not to,” Manafort told George Stephanopoulos in an interview on ABC’s “This Week.” “He’s now attacking this past weekend all the other Republicans who ran for president, as well saying they should have done a better job. Well, if he feels that way he should have run. He was a coward.”

 “Coward?” Stephanopoulos replied.

 “He didn’t want to get into the race,” Manafort continued. “He had an opportunity to get in the race and chose not to, and now he’s criticizing all those who Trump beat for not running a good campaign and he’s criticizing Trump who got over 3.5 million votes more than Romney got in the primaries this year.”

 Many pundits believed Romney was preparing to enter the presidential race, but was forced out when Jeb Bush signed up a majority of Republican mega-donors to contribute to his Super PAC.

Rather than play a role in helping to unite the party around the nominee chosen by the voters, Romney has decided to lob spitballs at Donald Trump and help elect Hillary Clinton.

But neither Trump nor his campaign team will allow Romney’s verbal jabs to go unanswered.

And as Trump has risen in the polls on the strength of Republican voters coalescing around his candidacy, it appears an ever-dwindling group of Republicans are paying attention to Mitt Romney and his comments.