Didn't you hear Pence? This is a
broad shouldered man
Difficult, yeah, but I don't think it's impossible. Certainly for a man of his wealth he should be able to get the finest tailor in New York!
His suits are often quite shapeless, and with that body type he really needs to be adding shape to his shoulders which the poor fit doesn't do. He often buttons his jacket when he sits, and has it open when he stands. So why button it when you sit down?
the length of the tie and the open jacket when he stands draw focus to his gut too.
The trousers often don't fit either which makes it look less a body shape issue and more a shabbiness issue. I think it's simply a case of him not knowing how to dress for his body type-and for a man so judgmental of others' appearance he really should.