Special counsel Jack Smith on Monday took the “extraordinary” step of asking the Supreme Court to step into an ongoing legal battle about whether former President Donald Trump can claim immunity from criminal charges tied to his alleged interference in the 2020 election. At the heart of Smith’s request to the Supreme Court is a concern about timing: the special counsel wants to start the trial in March. If prosecutors have to wait for federal courts to resolve the immunity question through the normal process, it could take months.