Designated Survivor (2016-19) was a TV show, starring Kiefer Sutherland and decently loaded cast, originally on ABC and then on Netflix. It ran for 3 seasons and was cancelled without a finale. I enjoyed the show, which was about a terrorist attack on the US government, during the State of the Union address. When the presidential succession is all together at once, a designated survivor is selected to carry on succession. Tom Kirkman is the selectee and becomes president with basically no legislative government. The show is fast paced, with constant problems and conflicts for the new president to fix. I've only watched it once - I watched it all in 2019 when it moved to Netflix - but I'd possibly watch it again, even without an ending.