Today is Friday, Feb. 21, the 52nd day of 2020. There are 314 days left in the year. Today’s Highlight in History: On Feb. 21, 1975, former Attorney General John N. Mitchell and former White House aides H.R. Haldeman and John D. Ehrlichman were sentenced to 2 1/2 to 8 years in prison for their roles in the Watergate coverup (each ended up serving a year and a-half). On this date: In 1613,…