A vulnerable GOP senator called on Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE to drop out of the presidential race in the wake of an audio tape showing Trump making sexually explicit comments about women.

"@realDonaldTrump should drop out. @GOP should engage rules for emergency replacement," Sen. Mark Kirk Mark Steven KirkLiberal veterans group urges Biden to name Duckworth VP On the Trail: Senate GOP hopefuls tie themselves to Trump Biden campaign releases video to explain 'what really happened in Ukraine' MORE (R-Ill.) wrote on Twitter Friday.

.@realDonaldTrump should drop out. @GOP should engage rules for emergency replacement. — Mark Kirk (@SenatorKirk) October 8, 2016

Former Utah Gov. Jon Huntsman likewise called for Trump to exit the race, leaving his running mate Mike Pence Michael (Mike) Richard PenceButtigieg stands in as Pence for Harris's debate practice Trump argues full Supreme Court needed to settle potential election disputes Pence adviser knocks ex-staffer who criticized Trump on COVID-19 MORE to lead the ticket.

Audio surfaced Friday of Trump in 2005 making vulgar remarks about women and saying that his celebrity allows him to "do anything" with women, including "grab them by the p---y."

The comments received swift backlash from Republicans, with Republican National Committee Chair Reince Priebus saying that "No woman should ever be described in these terms or talked about in this manner. Ever."