Former Vice President Joe Biden said so-called assault weapons "should be illegal" in a Monday interview with CNN host Anderson Cooper. 
Democratic presidential hopeful Julian Castro clashed with a CNN panel over his proposal to decriminalize illegal border crossings, arguing decriminalizing the border is necessary for ending the family separation and child detainment policy. 
Sen. Kamala Harris (D., Calif.) dismissed an attack Wednesday by Rep. Tulsi Gabbard (D., Hawaii) on her controversial record as a prosecutor, calling herself a "top-tier candidate" getting attacked by someone at "zero or 1 percent." 
Rep. Ted Lieu (D., Calif.) suggested Wednesday former special counsel Robert Mueller reached a conclusion regarding whether President Donald Trump committed a crime, but refrained from issuing an indictment only because of a memorandum from the Department of Justice. 
Sen. Elizabeth Warren (D., Mass.) said "there are two co-equal branches of government" during an appearance on CNN's "Anderson Cooper 360" Tuesday. 
When Sen. Bernie Sanders (I., Vt.) appeared on Anderson Cooper's CNN show on Monday night, he faced questions on a range of political topics, including Oprah Winfrey, but he did not have to address the deepening federal probe into a 2010 Burlington College land deal involving the senator's wife and former school president, Jane Sanders. 