One week after saying he would “certainly” consider giving Elon Musk a Cabinet role in a possible second administration—and getting an immediate pledge by Musk to serve—Donald Trump appears to be rethinking the wisdom of such an idea.

Speaking to a former Navy Seal about the prospect, the ex-president said, referring to the Tesla owner: “He wants to be involved. Now look, he’s running big businesses and all that, so he can’t really—I don’t think he’d be [free for] the Cabinet.” Trump added that though he would “absolutely” nominate Musk for such a role—which requires Senate approval—he doesn’t “know how he could do that with all the things he’s got going.” Trump went on to say he’d be up for having Musk serve as a consultant.

As the Daily Beast notes, the real reason Musk probably isn’t going to have a Cabinet position in a potential second Trump term is that he would have a mountain of conflicts of interest, and as CNN reported last week, it wouldn’t be as simple as selling stock in his company or putting his shares in a blind trust, because “Musk, the CEO and single largest shareholder of Tesla, can’t just sell his stake without causing the price to collapse. And given the scope of his business interests, it’s hard to see where he could serve without having to recuse himself regularly.”

“Much would depend on what the job is and how it relates to his economic interest,” Richard Briffault, a professor at Columbia Law School, told the outlet. “Is there anything that wouldn’t relate to his economic interests? I’m not sure what that would be.”

In other Trump-Musk news, Rolling Stone reports that while Trump may have glowing words for the world’s richest man in public, such remarks may not tell the full story:

According to a person close to the twice-impeached convicted felon, Trump “thinks [Musk’s] weird. Sorry to use a word used a lot by Democrats now.” This source has spoken to the former president about Musk as recently as July. Another source, who has been in the room multiple times over the years when Trump has spoken privately about Musk, relays to Rolling Stone that Trump has at times, as recently as in the past few months, said that Musk is “boring,” annoying, and prone to mood swings.

Sources note that while Trump obviously says some nicer things privately about Musk now, he still sometimes peppers in his ruder assessments. Indeed, even publicly, Trump’s true feelings find ways of trickling out on occasion. The former president recently described Musk as “a very different kind of a guy,” which sources close to Trump describe as not a compliment.

In a statement, a spokesperson for the Trump campaign told Rolling Stone that the ex-president and Musk “agree on the big issues facing our country, and that Kamala Harris must be stopped before she completely destroys America.” Musk is currently heading up a Trump-backing super PAC that, to date, has spent $37 million on the effort to reelect him.