In an exclusive story published Friday, Breitbart's Matthew Boyle has revealed the name of the person who leaked private communications between the private citizen and now Senator and Republican vice-presidential candidate JD Vance and an until-now unnamed person, which included uncomplimentary comments Vance made in 2020 about then-President Donald Trump. The leaker, named Kevin Gallagher, is a consultant for Deloitte, a financial services firm. The Washington Post originally broke the story about the leaked messages but did not release the name of the person with whom JD Vance was messaging. Boyle wrote:

But what the Post did not do is tell its audience who Vance was communicating with in these messages, or provide the full context of the conversation, since it only reported part of one side of it. The Post argued it granted the source who provided these messages anonymity “because of concerns about retaliation,” but Breitbart News can reveal the person’s identity here for the first time as a well-connected Deloitte consultant.

Here's where Breitbart News spills the goods on the leaker:

The Deloitte consultant, whose identity the Washington Post’s Peter Jamison hid from the newspaper’s readers, is named Kevin Gallagher. Deloitte’s website lists Gallagher as a “principal” with the firm, based in Connecticut. Breitbart News has seen a screenshot of messages that Vance sent to Gallagher—the other side of the conversation is not available, because Gallagher had deleted his account, thereby deleting the messages—confirming that Gallagher is in fact the recipient of these.

The Washington Post, interestingly, despite being a newspaper that claims to support transparency, did not provide either to Vance’s team earlier in the week when they were trying to respond to the newspaper’s inquiries or to its readers the full context of the conversations, including comments and questions that Gallagher made to Vance to prompt Vance’s comments in response that the Post deemed newsworthy. Vance’s team did not deny the authenticity of the messages – the senator’s advisers just asked the Post to be transparent about the full context of the conversations and with whom the messages were exchanged. The Post made clear in its story that it refused to do so.

A "principal" generally means a person highly placed in the firm. Deloitte, among other areas, provides services to various levels of government. For now, anyway. Should the Trump/Vance ticket win the election in November, this debacle may well end up costing Deloitte some significant government contracts. A company, after all, that does business with the United States government should be expected to maintain some degree of control over the unauthorized release of information; in this, Deloitte is not doing so well, a source told the publication:

A source close to Trump’s family told Breitbart News that the Trumps are watching this episode with horror. “The entire government affairs team at Deloitte should be fired,” the source close to Trump’s family said. “If they’re too dumb to understand how this is going to affect Deloitte’s access to a Trump administration then they have no business working in government affairs.”

Leaking of personal information by the employee of a service organization like this is surely grounds for dismissal. It's hard to imagine not firing, at a minimum, Kevin Gallagher, who actually leaked the confidential messages.

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What's unclear is Gallagher's motivation for releasing these messages, although it is very likely for political reasons. It's common knowledge that JD Vance was not always enamored of Donald Trump, although the vice presidential candidate maintains now that Trump's record of accomplishments during his first term converted Vance to a Trump supporter. 

Gallagher and Vance evidently knew one another, possibly while both were attending Yale, although Vance graduated from Yale Law School two years after Gallagher graduated with his undergraduate degree.

In the Breitbart story linked above, a spokesman for JD Vance, William Martin, stated:

Martin, Vance’s spokesman, told Breitbart News that this whole charade from the Post and from Gallagher on Deloitte’s behalf reeks of dishonesty.

“The Washington Post has unethically and disgracefully covered this story, refusing to provide the full context of this exchange and intentionally leaving out proof that Senator Vance had made similar remarks publicly around this time,” Martin said. “It comes as no surprise that the propaganda arm of the Kamala Harris administration would behave this way, but the fact that senior officials at Deloitte Consulting are now actively working to interfere in the presidential election on behalf of the Democratic ticket is appalling. The counterparty to this conversation, Mr. Kevin Gallagher, has taken it upon himself as a principal at Deloitte to wade his employer in the fray of a presidential election by leaking private conversations to the press in order to boost the failing Kamala Harris campaign.”

As of this writing, neither Deloitte nor the Washington Post has made any further statements on the matter.