Reported originally by GotNews, the primary source of the information leaks in the Trump administration is none other than #NeverTrump Republican Katie Walsh.

From GotNews: White House Deputy Chief of Staff and #NeverTrump Republican Katie Walsh has been identified as the source behind a bunch of leaks from the Trump administration to The New York Times and other media outlets, according to multiple sources in the White House, media, donor community, and pro-Trump 501(c)4 political group. "Everyone knows not to talk to her in the White House unless you want to see it in the press," says a source close to the president. "The only question is whether or not she's doing it at the behest of [White House Chief of Staff] Reince Priebus or if she's doing it to advance herself in DC media circles." One source in particular stands out: Walsh is close to Maggie Habberman, a New York Times reporter who wrote fawning pro-Republican National Committee stories during the presidential election. Walsh has also planted stories in The Washington Post and Politico. Walsh is referred to as "Madame President" in the White House, says a senior aide. "It isn't a compliment." Walsh would have significant access as she controls the president's schedule. There's also reportedly a trove of e-mails where Katie Walsh and Reince Priebus discuss how to rid themselves of Trump, according to a former #NeverTrump consultant.