 ...to Vance after he became the GOP vice presidential nominee. She left a congratulatory voicemail. He returned the call and the two exchanged pleasantries. Harris urged Vance to accept a debate invitation either next week or next month. According to people familiar with the matter, the two campaigns are still working on terms for a debate. Meanwhile, Vance will be the keynote speaker here at the Republican National Convention Wednesday night when he will formally accept the vice presidential nomination. Greg Clugston, Milwaukee.