The GOP’s Senate candidate in Minnesota appeared to challenge a critic on social media to a fight Tuesday. The exchange was prompted when Royce White, a former basketball star and Black Lives Matter supporter turned MAGA conspiracy theorist, touted his endorsement by Kari Lake, the GOP’s controversial Senate frontrunner in Arizona. “It is an honor to receive Kari Lake’s endorsement. I appreciate her support and fight. She is exactly what this country’s permanent political class and legacy media are afraid of. I look forward to joining her in the senate to bring value back to America citizenshi…