I am baffled by the news Pence is filing papers to run.
Don't get me wrong. I think Pence is a nice, honest guy, but he lacks charisma and doesn't stand a chance in the primaries IMHO.
I don't believe half the people running actually believe they'll win, there are plenty of reasons of running regardless, most importantly money.
Building super pacs with donations gets you tours around the country, fame, speaking events after etc...
seeing yourself on tv for some time, staying relevant.... Just look at Christie