Benedict Arnold a Loyalists?

Loyalist because he helped the king

Benedict Arnold was never a loyalist. The only reason why he was a spy was because he needed the money. Just in case you had not known Benedict Arnold was living far beyond his means.

Benedict Arnold was neither a loyalist nor patriot. It's been said he is a opprotunist, which basically means he switched sides. Although he was a govenor on the American side in the first place. But...

He was a patriot

Collaborating with the British while serving in the US army makes him a traitor.