The tweet was referring to the late Robert Byrd, a United States senator from West Virginia and one of the longest serving US senators in history. In the 1940s, Byrd was an active member in the Ku Klux Klan, even creating a local chapter of the group. However, he dropped his membership before entering politics in the early 1950s, and in later years heavily apologized for his involvement with the group.When Byrd passed away in 2010, Clinton mourned him as a "friend and mentor."On August 14, Trump garnered scorn after using a graphic at a campaign rally targeting Hillary Clinton that bears remarkable resemblance to a graphic tweeted out last month by David Duke, a white supremacist and former Ku Klux Klan leader who supports the Republican presidential candidate.Duke’s original July 5 graphic features an emblem of the Israeli flag embedded on a $20 bill, and Clinton’s portrait replacing that of former US president Andrew Jackson, who normally graces the currency."@DiamondandSilk: Crooked Hillary getting desperate. On TV bashing Trump. @CNN, she forgot how she said a KKK member was her mentor.
— Donald J. Trump (@realDonaldTrump) August 27, 2016