Republican National Committee Treasurer KC Crosbie told fellow members Sunday night that she is running for RNC co-chair to replace Lara Trump, who said Sunday night she is stepping down from that post. “This position demands leadership, communication, and the ability to unify our diverse membership while supporting President Trump and his Administration’s bold initiative to “Make America Great Again,” Crosbie, who is also the RNC national committeewoman from Kentucky, wrote in an email to RNC members, which was obtained by NBC News. “I am committed to fulfilling the responsibilities of RNC Co-Chair with the same dedication I have brought...