MEDFORD, Mass.—Voters headed to the polls across Massachusetts Tuesday in a closely watched special election that threatened to tip the Senate's balance of power and undermine President Barack Obama's policy agenda. More Video News Hub: Senate Seat in Limbo A Hotly-Contested Election GOP Underdog Rises in Senate Race News Hub: White House Frets Journal Community Discuss: What will the outcome mean for the Obama administration? With much at stake, indications were that turnout was going to be high in Tuesday's balloting. Long lines were reported at polls across the state. Brian McNiff, spokesman for the secretary of commonwealth, said as many as 2.2 million voters were expected to go to the polls today, close to the number in 2006 when the state elected Democrat Deval Patrick as governor. As of noon, some 55,000 voters had cast ballots in Boston. By comparison, some 58,000 Boston voters had cast ballots by noon in 2006. Up for grabs was the seat left vacant by the death of Sen.[Read more...]