I'm sure Republicans throughout the country fell for obomas fake conservatism and voted for him too. How a person registers to vote does not tell how they actually voted.
I can see where people would naturally assume Trump voted democrat. They were his closest business partners, and he agreed with almost everything they stood for. They were (are) the best of buddies for decades. He threw money at democrats like candy at a parade - even Harry Reid! (Trump was rewarding him for passing oboma care)
So you can understand why a majority familiar with Trump before he decided to run for office would assume, because he was a big oboma supporter, that he probably voted for him without seeing a problem with it.
If Trump loses the primaries, there's no doubt in my mind he'd vote for Hillary. The two are like peas in a pod. He thinks she's wonderful.
AGAIN that image depicts BOTH Trump’s voter REGISTRATION AND THE BALLOT HE WAS GIVEN - BOTH INDICATE REPUBLICAN ... SO YOU ARE WRONG in stating he voted for Obama ... Or, do you now wish to convince us that think Obama ran as a Republican?