With Missouri still officially too close to call but with Trump in the lead by 1,726 votes in the Republican primary over Ted Cruz, turnout in 2016 is running 0.9 million v 0.6 million in 2008, up 50%.
Democrat turnout is down 25% at 0.6 million in 2016 v 0.8 million in 2008 with Hillary Clinton leading Bernie Sanders by 1,531 votes.