Missouri political mega-donor Sinquefield gives millions

JEFFERSON CITY, Mo. (AP) — Missouri mega-donor Rex Sinquefield is pouring millions of dollars into political committees before the Aug. 2 primary and Nov. 8 general election. Sinquefield donated more than $1.5 million Friday to conservative political group Missouri Club for Growth. His largest donation of about $2.8 million Friday went to the Great St.…