The People's Party is so extremely broad that it's surprising the party hasn't been ripped apart yet. Apparently no one considers it questionable to have a conservative regional executive in the Pacific and to run a candidate for Northeast Senate whose proposals even make socialists blush. Since most of its members are highly popular individuals the party doesn't suffer from its complete lack of a coherent ideology, though.
This is an easy political attack from the right-wing fringes, but it's not actually true. People like Matt and Sawx (is there something in the water in the NE?) are certainly on the left wing of the party, but in general most of our elected officials fall into the centre to centre-left category. It's easy to attack a party built around the principle of consideration and consensus, but I think I can live with that.
Because the Fedoralists are a doomed joke and the DRs are the punchline to that joke (sorry guys), Labor and TPP are the only parties in the game that are even semi-legitimate political forces. As such, left-wingers who for whatever reason don't feel at home in Labor tend to gravitate to us. Similarly, Simfan's disdain for the increasingly Cro-Magnon conservatism of the Fedoralists (vice chair JCL!) meant that TPP was the natural choice, even though he is obviously very much to the right of much of the party.