The new senate president
You're referring to the newly elected Senate President!
As of my knowledge cutoff, the current Senate President of the United States is Kamala Harris. She was sworn in as the 49th Vice President of the United States on January 20, 2021, and as the President of the Senate, she assumes the role of Senate President.
However, please note that this information may change over time, and I'll do my best to keep my knowledge up to date. If you're looking for more information or want to know about a specific Senate President, feel free to ask!