The drop in popularity comes after Caitlyn Jenner came out as transgender in aVanity Faircover story in June 2015.
Caitlyn was already falling in popularity.
Now it is suddenly controversial, Wattenberg said.

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Even parents who are huge Donald Trump supporters are unlikely to name their child Donald.
In part, we just want to avoid controversy in picking names.
Caitlyn Jenner has remained a controversial figure in her support of Donald Trump and the traditionally anti-LGBTQ Republican party.
I believe in little things like the Constitution and freedom.
I believe in minimal government… And so Republicans have done a better job in that direction.