Sen. Tim Scott, a potential running mate if Donald Trump becomes the Republican presidential nominee, is treading carefully on questions about whether he would have certified the 2020 election had he been vice president at that time.

On Jan. 6, 2021, about two months after Trump lost the White House, then-Vice President Mike Pence defied his boss and refused to use his largely ceremonial role in overseeing the election certification process to block Democrat Joe Biden’s victory. Pence went forward with ratification of the Electoral College even after a violent mob of Trump supporters, some of whom chanted “Hang Mike Pence,” swarmed the U.S. Capitol, interrupting the congressional proceedings and forcing Pence, his family and staff into hiding in the complex.

Scott, a Trump rival in the 2024 race who dropped out and later endorsed the former president, declined to say in two Sunday news show interviews whether he would have acted differently as vice president.

“I’m not going to answer hypothetical questions, No. 1,” said Scott, R-S.C. He added: “You’re asking a hypothetical question that you know can never happen again.”