[RetiredArmy]

Didn't they just pass a law in SD that would prevent Dash-hole from running for both President and Senate at the same time?

[William McKinley]

Yes. I believe so.

[William McKinley]

But I think he could "run" for the Democrat nomination without having to resign his seat. It would just be that come November, he could not be on the ballot for both positions. If I am recalling correctly. So he could try for the nomination, and if he doesn't get it, still run for the Senate.