Lowered eyebrows support expressions of concern by Carson.
Carson has a nice gentle smile, an asset.
Bush is daring is laugh at Trump, that's a big emotive move for otherwise subtle Bush.
Chin pushed up in disgust, anger and disappointment in country's standing is Trump's constant emotional signal.
Trump says he's never attacked Paul on his looks but "there's plenty of subject matter there":
Smirk of Paul ms. pouting disgust of Trump: what a match up!