ROFL.. still trying to sell that canard 'eh?
I am unaware of ANY VP that took head of state intro calls instead of POTUS
Joe Biden does not need "introduction" calls. Biden was vice president for eight years and intimately knows leaders and prominent politicians the world over .
Donald Trump and Bill Clinton needed "intro" calls.
Unlike Trump, Biden was focused on a landmark legislative initiative in his first 40 days, and it makes emminent sense to let his vice president field some diplomatic duties
