Why are Trump supporters wearing diapers at rallies?

Ahead of US Presidential elections, Donald Trump's supporters are showing up at his rallies wearing diapers. This comes after recent developments in Trump's hush money trial case, in which his former lawyer Michael Cohen referred to him as "Von ShitzInPantz". Hitting back at Cohen, Trump's supporters wore diapers and t-shirts that read 'Real Men Wear Diapers' and 'Diapers over Dems'.