Americans Tuesday will be voting not just for a president but also in a range of other elections, most notably in Congress. All the seats in the House of Representatives and one-third of those in the Senate are up for grabs. Control of Congress is at stake, with ever-tight races for the House and Senate that will determine which party holds the majority and the power to boost or block a president’s agenda, or if the White House confronts a divided Capitol Hill, as FRANCE 24’s Oliver Farry explains.