A sign is seen at a polling station in Marietta, Georgia, the United States, Jan. 5, 2021. Voters are casting ballots in the southeastern state of Georgia for U.S. Senate candidates in two runoffs on Tuesday. (Photos: Xinhua)

A polling station is seen in Marietta, Georgia, the United States, Jan. 5, 2021. Voters are casting ballots in the southeastern state of Georgia for U.S. Senate candidates in two runoffs on Tuesday.

A polling station is seen in Marietta, Georgia, the United States, Jan. 5, 2021. Voters are casting ballots in the southeastern state of Georgia for U.S. Senate candidates in two runoffs on Tuesday.

A sign is seen at a polling station in Norcross, Georgia, the United States, Jan. 5, 2021. Voters are casting ballots in the southeastern state of Georgia for U.S. Senate candidates in two runoffs on Tuesday.