Special counsel Robert Mueller has obtained tens of thousands of emails from members of Donald Trump’s presidential transition team, adding to speculation about whether more indictments could follow in the wake of the arrests of Michael Flynn, Paul Manafort and two other former Trump officials. Axios reports the emails include documents from seven different accounts, including one operated by Trump’s senior adviser and son-in-law, Jared Kushner. At the White House Sunday, President Trump blasted Mueller’s move, saying the situation was “not looking good.” But Trump said he has no plans to fire Mueller.

President Donald Trump: “My people are very upset about it. I can’t imagine there’s anything on them, frankly, because, as we said, there’s no collusion. There’s no collusion whatsoever. But a lot of lawyers thought that was pretty sad.”

One of Trump’s lawyers said in a letter to congressional leaders that Mueller had improperly received the emails, prompting a rare statement from Mueller, who defended his actions as part of an ongoing criminal investigation. The spat came as Congressmember Adam Schiff, the ranking Democrat on the House Intelligence Committee, accused Republicans of maneuvering to end the committee’s investigation into Trump-Russia ties.