Democrats now have an asterisk on their 51-seat majority in the U.S. Senate, with Arizona Sen. Kyrsten Sinema announcing that she will switch her party affiliation from Democrat to Independent. She will be the third independent senator joining Sen. Bernie Sanders and Sen. Angus King, who both caucus with Democrats. NewsHour's Lisa Desjardins and Stephanie Sy join Judy Woodruff to discuss. Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG Find more from PBS NewsHour at https://www.pbs.org/newshour Subscribe to our YouTube channel: https://bit.ly/2HfsCD6 Follow us: TikTok: https://www.tiktok.com/@pbsnews Twitter: http://www.twitter.com/newshour Instagram: http://www.instagram.com/newshour Facebook: http://www.pbs.org/newshour Subscribe: PBS NewsHour podcasts: https://www.pbs.org/newshour/podcasts Newsletters: https://www.pbs.org/newshour/subscribe