Youngest Senator on January 4, 2017

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I know most of these are longshots. "Other" could be new people appointed, or Cotton ends up out of the Senate for some reason, making someone older than him the youngest.

Anyway, my prediction is (unfortunately) still Cotton, but there's an outside chance of Murphy or Kander (Kander IMO has a higher chance of winning, but Murphy is younger than him so therefore has a higher chance of being the youngest).

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BTW, I don't actually know if Callahan is younger than Cotton, but I included him just in case.

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Misty Snow? In Utah?

It'd be great but not gonna happen IMO.

I agree, unfortunately. She's a terrible candidate for Utah. I included her (and other hopeless candidates) for completion's sake, but I'm aware the only plausible answers are Cotton, Kander, and Murphy.

When was Mark Callahan born? I can't find his age/birth info anywhere?

http://journalism.uoregon.edu/newsroom/special-projects/mark-callahan/

This says he's thirty-six, and it was published the day after Cotton's thirty-seventh birthday in 2014.