The Senate received Abrams' nomination in June, which includes the titles of United Nations Command and Combined Forces Command in Korea, as well. If confirmed, Abrams would succeed Gen. Vincent Brooks, who has led USFK since 2016.
Abrams would take command as the U.S. continues denuclearization talks with North Korean leader Kim Jong Un, an ongoing effort after the historic summit earlier this year between President Donald Trump and Kim.
Also scheduled to appear before the Senate Armed Services Committee is Navy Vice Adm. Craig Faller, who is being nominated to lead U.S. Southern Command.
Rumors first began swirling about Abrams' move earlier this year. A local newspaper in South Korea reported in May that Abrams was being considered for the post.
Abrams has led Army Forces Command, which is in charge of preparing units based in the contiguous United States to deploy abroad, since August 2015.
The career armor officer graduated from the United States Military Academy in 1982 and has commanded units in the now-inactive 3rd Armored Division, the 1st Cavalry Division and the 3rd Infantry Division.
The president seemed to correct Mattis in his tweet and cast doubt on possible joint exercises this spring.
The USFK assignment includes oversight over all of the American troops stationed in South Korea, as well as over joint annual exercises carried out on the peninsula.