Question: House of James Potter

[uncmark]

No: HPFGUIDX 34299

Having an argument with my sister and can't find it written in any of 
the books. She says that James Potter was Slytherin since all 4 
marauders were in the same house and Hagrid said in book 1 "There's 
not a single witch or wizard who went bad who wasn't in Slytherin." 
and Sirius Black went bad. 

I say that Hagrid was talking about Valdemort and Malfoy and over 
generalizing. Opinions?

Uncmark