Having climbed to the top of Waystar Royco’s org chart, Matthew Macfadyen now is setting his sights on a different seat of power: the White House. The Succession alum has joined Netflix’s Death by Lightning, TVLine has learned. The drama is based on Candace Millard’s 2011 book Destiny of the Republic, which chronicles the rise of President James Garfield and his assassination by presidential hanger-on Charles Guiteau. Macfadyen will play Guiteau opposite Michael Shannon (George & Tammy) as Garfi