Arnold Schwarzenegger has been busy enough since he left office and right now he has a good balance between politics and movies. Other than being featured in movies like The Expendables, he has a few feature films on the docket. Even though Arnold Schwarzenegger has been more of a movie star to most of us, there is a reason he is good at politics.
On the side, he is a very good investor and has been making money through various investments since he was a bodybuilder. His first purchase was an apartment building and after that, he invested in Planet Hollywood, a shopping mall in Ohio and really talks about becoming successful from many different teachers.
One of those teachers happens to be Donald Trump. Being able to run a business and understand the economy is a great pre-requisite for politics, so that could be a reason to have him on your side.