Fiat has owned most of chrysler since 2011, they are now buying the remaining 40 percent they don't already own. chrysler was doomed at the time and the government brokered the deal to get out of the bailout.
It's just business, Renault owns part of Nissan, Ford owns Volvo, GM owns Isuzu , Mazda, Toyota , Mitsubishi all have ties with US car makers. It's hard to keep up.... Half the "imports" are now made here in the US.
It's how it is nowadays.
If Fiat hadn't bought Chrysler they would probably be gone by now, instead thier sales are way up, Fiat must be doing something right. I personally don't like the new Cherokee, but they are selling them like crazy, go figure.