Senate Dem: Trump will pick 'handsome' Pence
© Greg Nash
Democratic senator says Trump "cares more about the appearance."
"Donald Trump cares more about how people look than the substance," McCaskill said on MSNBC's "Morning Joe," basing her prediction on "how Pence looks."
"[Trump] cares more about the appearance, on his polling and on his magazine covers and how beautiful his wife is," said McCaskill, who said it was "terrific" that Trump's wife, Melania, a former model, was beautiful.
"I think he will pick Pence because he looks like somebody who would hang out with Donald Trump: He's handsome and cuts a smart figure, but he isn't going to overshadow Trump," she said.
McCaskill, a backer of presumptive Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonGOP political operatives indicted over illegal campaign contribution from Russian national in 2016 Clinton lawyer's indictment reveals 'bag of tricks' Attorney charged in Durham investigation pleads not guilty MORE, argued that two other top Republican vice presidential prospects, New Jersey Gov. Chris Christie and former Speaker Newt Gingrich (R-Ga.), "could be capable of overshadowing" Trump. 
Trump and his family met privately with Pence at the governor's home in Indiana on Wednesday, part of the final frenzy of meetings with potential vice presidential picks ahead of a scheduled announcement Friday.