heh, the person they did for the Roasts in 2012 (Trump's was 2011) was Roseanne Barr
iirc, someone who was one of the roast writers (lots of them either move up to roaster or show up elsewhere like SNL/podcasts, pete davidson was one for a while, so was nathan fielder, etc.) said that Donald actually gave them less rules than most of the roastees do, the only real thing they weren't allowed to joke about was questioning his wealth*
*and Barron, since he was like five or whatever