Good morning Sunday Shitposters!!
nope, It will be Chuck Grassley.
"The president pro tempore of the United States Senate (often shortened to president pro tem) is the second-highest-ranking official of the United States Senate. Article One, Section Three of the United States Constitution provides that the vice president of the United States is the president of the Senate (despite not being a senator), and mandates that the Senate must choose a president pro tempore to act in the vice president's absence."
https://archive.org/details/protempresidents00wash/page/9