MTP NOW Feb. 27 — China lab leak questions; Slotkin runs for Senate; DeSantis, Haley, Pence hit trail

U.S. officials are sending a warning to China as the country considers sending military aid to Russia. The Republican presidential primary field is heating up as former Vice President Mike Pence, Gov. Ron DeSantis (R-Fla.) and former UN Ambassador Nikki Haley take to the campaign trail.