About 20 years ago, I read a book series (about 10-12 books) that was about a political group around the planet Jupiter. The main character became president and then a dictator by setting up a constitutional convention that eliminated the old constitution and setup a dictatorship . Back when he was running for president, he used a atmosphere 'train' to go between the moons and settlements in the upper atmosphere of Jupiter.
I told a friend about the series and now he wants to read it but I can't find the book names or author.

It could be the Bio of a Space Tyrant series.

Thanks. That is the series. For some reason, I thought there were many more books.