Democratic presidential hopeful Beto O'Rourke said that his mandatory gun buyback program would include "criminal" consequences for people who do not turn over their firearms. 
MSNBC anchor Andrea Mitchell turned to former Obama adviser Ben Rhodes to "fact check" President Donald Trump on American involvement in Syria. 
Kentucky Senate candidate Amy McGrath praised a jobs initiative that her opponent, Senate Majority Leader Mitch McConnell, has championed for years.
MSNBC host Chris Matthews on Monday said he was a "big booster" for South Bend mayor Pete Buttigieg. Buttigieg has been rising in the polls after positioning himself as a centrist alternative to former vice president Joe Biden. Matthews said the strategy has proven effective, adding that "Buttigieg is going to do really well" as the primary voting nears. 
Former Obama administration adviser Van Jones accused Hillary Clinton of smearing presidential hopeful Rep. Tulsi Gabbard (D., Hawaii) “with no facts.”
Washington Free Beacon founding editor Matthew Continetti on Friday said that former secretary of defense James Mattis’s resignation gave Turkey the “green light” for its offensive against the Kurds in Syria.
Former vice president Joe Biden attacked Sens. Elizabeth Warren (D., Mass.) and Bernie Sanders (I., Vt.), comparing their support of Medicare for All to President Donald Trump's "game." 
Former Planned Parenthood president Leana Wen praised Rep. Tulsi Gabbard's (D., Hawaii) advocacy for "safe, legal, and rare" abortion at Tuesday night's Democratic debate. 
South Bend mayor Pete Buttigieg released a campaign ad attacking Sens. Elizabeth Warren (D., Mass.) and Bernie Sanders (I., Vt.) for their health care proposals. 
Los Angeles Lakers forward LeBron James on Monday said Houston Rockets general manager Daryl Morey's tweet supporting pro-democracy protesters in Hong Kong was "misinformed or not really educated on the situation." 