President Trump walked out of an interview with NBC News in Wisconsin after he was challenged on his claims of election fraud and struggled to provide evidence for those claims.  In an interview with NBC News' Kristen Welker that was taped Friday and aired Sunday, Welker pressed the president for evidence on his claims of election fraud in the 2020 election and claims that election fraud is currently happening in the California primaries . California, which allows for last-minute mail-in