Sorry, this video has expired  Batttle for control of the US
Senate  Updated November 02, 2012 23:36:00  While the White
House race is a toss-up and the Republicans are expected to hold
the House of Representatives, the Democrats are hopeful of
retaining control of the Senate. The race could come down to
states like Massachusetts, which is seeing a fierce battle for
the seat once held by the late Senator Ted Kennedy.  Source:
Lateline | Duration: 6min 58sec  Topics: us-elections, united-
states   EMMA ALBERICI, PRESENTER: While the White House race is
a toss-up and the Republicans are expected to hold the House of
Representatives, the Democrats are hopeful of retaining control
of the senate.  But the contest is still close, with Republicans
potentially just three seats away from winning back the chamber.
The race could come down to states like Massachusetts, which is
seeing a fierce battle for the seat once held by the late
senator Ted Kennedy.  North America correspondent Craig
McMurtrie travelled to Massach