Warren is not stupid.
Running for President insulates her from prosecution in the event she is tied to any "Storm"-related offenses in the coming months.
Anyone accusing Elizabeth Warren of high crimes will be immediately castigated by all media for "political hit job" and "Nixonian tactics".
Frankly all top Dems should declare for President and the Trump Admin will have an awfully hard time getting any charges to stick in the court of public opinion.