Republicans began calling for President Joe Biden to resign the presidency after the president ended his reelection bid Sunday. Biden announced he would not accept the Democratic Party’s nomination for president in a Sunday afternoon post on X, following it up by endorsing Vice President Kamala Harris for the Democratic nomination. Republicans responded to Biden’s decision to drop out by demanding he resign the presidency. “If Joe Biden is not fit to run for President, he is not fit to serve as President,” Republican House Speaker Mike Johnson of Louisiana posted on X. “He must resign the offi…