In December 2020, Walberg was one of 126 Republican members of the House of Representatives to sign an amicus brief in support of Texas v. Pennsylvania, a lawsuit filed at the United States Supreme Court contesting the results of the 2020 presidential election, in which Joe Biden defeated incumbent Donald Trump.
In December 2020, Walberg was among 126 Republicans who signed an amicus brief supporting Texas v. Pennsylvania, a case before the U.S. Supreme Court about the 2020 presidential election outcomes, in which Joe Biden won over incumbent Donald Trump.