Weight is one of those things that most people can largely change about themselves. I agree it's a lot harder to regulate your weight when you have conditions that reduce your mobility and make you burn far fewer calories like ME/CFS or fibromyalgia, but the basic principles of thermodynamics still apply.
Trump isn't one of those people with a debilitating condition other than his age. He's genuinely an unpleasant glutton who lives on a diet of Big Macs and Diet Coke.
Ehh fat people need to stop trying to hone in on the moral high ground of race, sexuality, and disability and just accept they are fat fucks because they eat like pigs and don't deserve special treatment. If you don't like it put down the hoho and eat some fucking kale.