The Nebraska Republican Party on Monday called for GOP state Sen. John McCollister to re-register as a Democrat after he accused the party of enabling white supremacy in the United States. ... McCollister gained national attention on Sunday after sharing a series of tweets condemning the Republican Party for what he described as its complicity in "obvious racist and immoral activity inside our party." "The Republican Party is enabling white supremacy in our country," McCollister said on Twitter. "As a lifelong Republican, it pains me to say this, but it’s the truth."