The Taft-Hartley Act authorizes the president to temporarily prevent strikes so bargaining parties can try to settle. Biden has said he won’t intervene.

https://www.king5.com/mobile/article/news/verify/national-verify/president-can-intervene-with-taft-hartley-act-in-the-dockworkers-strike/536-649879d5-2c68-40e0-bfbf-7437bd105e65