NBC: Acting Ambassador To Ukraine Bill Taylor To Step Down

Bill Taylor is set to leave his post at the US embassy in Kiev on January 2nd. He gained attention as a key witness in the impeachment inquiry into President Trump, questioning the withholding of military aid to Ukraine. Taylor is currently the acting ambassador, a role he took after Maria Yovanovitch was removed. His temporary appointment ends on January 8th, and it's uncertain who will permanently replace Yovanovitch.

Who was the ambassador that Taylor was asked to replace?

What is unclear regarding President Donald Trump's decision about the ambassador position?