The Democratic National Committee will vote Saturday to shake up the start of its primary calendar. President Biden championed the revamped lineup ahead of the full membership vote. Supporters say the overhaul empowers voters who have gone unheard in battleground states. Despite some divisions over the proposed changes, Democrats are hoping to showcase unity. Ed O'Keefe reports from Philadelphia. "CBS Saturday Morning" co-hosts Jeff Glor, Michelle Miller and Dana Jacobson deliver two hours of original reporting and breaking news, as well as profiles of leading figures in culture and the arts. Watch "CBS Saturday Morning" at 7 a.m. ET on CBS and 8 a.m. ET on the CBS News app. Subscribe to "CBS Mornings" on YouTube: https://www.youtube.com/CBSMornings Watch CBS News live: https://cbsn.ws/1PlLpZ7c​ Download the CBS News app: https://cbsn.ws/1Xb1WC8​ Follow "CBS Mornings" on Instagram: https://bit.ly/3A13OqA Like "CBS Mornings" on Facebook: https://bit.ly/3tpOx00 Follow "CBS Mornings" on Twitter: https://bit.ly/38QQp8B Subscribe to our newsletter: https://cbsn.ws/1RqHw7T​ Try Paramount+ free: https://bit.ly/2OiW1kZ For video licensing inquiries, contact: [email protected]