John Cornyn and Ken Paxton are heading toward a May 26 runoff in the Texas Republican Senate primary following record spending.Police arrested a man with weapons and ammunition outside Ken Paxton's election night watch party in Dallas during the vote count.In North Carolina, Roy Cooper and Michael Whatley secured Senate nominations while Tom Cotton won his primary in Arkansas.Donald Trump praised all three Texas candidates as the NRSC spent millions to support John Cornyn against a MAGA-aligned challenge.