Republicans present united front while Democrats remain deeply divided

Sen. JD Vance is being viewed as the future of the MAGA movement in the Republican Party, which is presenting a united front at its convention while more Democrats call for President Biden to drop out. NBC News' Kristen Welker also reports that Democratic Senator Bob Menendez of New Jersey has told allies he will resign from Congress after being convicted on federal corruption charges, according to two people directly familiar with the conversations.