LORE (Story, Background, Character, etc.)
Hi David and Co.
In the writer's guide, we had said that senators serve for five year terms. The number of Senators changes per planet, but any recognized planet will have at least one. There's no fixed method that determines the number of senators. I think it would be a combination of population and influence. For example, Earth has five senators while Terra has two (a point they're a little annoyed about). Mars has two as well.
To your specific question, we haven't really named any historical senators unless we've needed to create them for lore pieces, so it's pretty open. But I'll add Walden Hughes as one of the Earth Senators in 2915. He sounds like a Universalist.