text:  Thank you so much, Mark. I really appreciate it. I am joined now by Ari Shapiro in the studio. So glad to have you here. It is good to be with you on this historic day. To listeners who are just joining us, we want to bring you up to speed that President Biden posted a public letter announcing that he will end his reelection campaign. He endorsed Vice President Kamala Harris, and this comes after weeks of pressure from within the Democratic Party. For the last few days, Biden has been in Delaware recovering from COVID, and he says he will offer the country more details in a speech this week.