No, one can mock or insult the President with impunity. The First Amendment applies here. It should be noted that in the 1790s, the Federalist-controlled Congress passed the Sedition Act which made criticizing the President or Congress a crime.
Polycystic kidney disease (PKD) is a genetic disorder characterized by the growth of numerous cysts in the kidneys. The kidneys are two organs, each about the size of a fist, located in the upper part of a person's abdomen, toward the back. The kidneys filter wastes and extra fluid from the blood to form urine.
xkcd, sometimes stylized as XKCD, is a webcomic created by Randall Munroe.The comic's tagline describes it as a A webcomic of romance, sarcasm, math, and language. Munroe states on the comic's website that the name of the comic is not an acronym but just a word with no phonetic pronunciation.kcd was also voted Best Comic Strip by readers in the 2007 Weblog Awards and 2008 Weblog Awards. It was also nominated for a 2009 NewNowNext Award in the category 'OMFG Internet Award'. Randall Munroe was nominated for the Hugo Award for Best Fan Artist in both 2011 and 2012.