https://www.bbc.com/news/election-us-2 [login to see] 4
The balance of power in the US Senate may not be decided until January, as Georgia may have to hold run-off elections for both its seats.
No candidate in either race has polled 50%, as required by state election law.
The run-off elections would take place on 5 January, two days after the new Senate is due to convene.
The Republicans currently have a 53 to 47 majority in the Senate and appear on course to retain control, with a loss so far of one seat overall.
The Democrats had high hopes of gaining the four seats they needed to take control, but many Republican incumbents held their seats.
If however the Democrats can gain both seats in Georgia, a traditionally Republican state, this would lead to a 50-50 tie in the Senate.