Maybe these things are entirely unrelated. The details of the SEC's concerns are not yet entirely clear. Having publicly criticized the president shouldn't make a person immune to law enforcement scrutiny. But even so, I wouldn't be surprised if, rightly or wrongly, some people draw the conclusion that if they don't want to make themselves a target for regulatory scrutiny, they should make their public political profile minimal to invisible. Or at least make it supportive of the president rather than critical of him.