US mid-term elections: Republicans win control of US Senate

The Republican Party has won control of the Senate in the US mid-term elections.

Republicans won Arkansas, Colorado, Iowa, Montana, North Carolina, South Dakota and West Virginia and the party set to strengthen its majority in the lower House of Representatives.

The result means Republicans have the power to shut down Mr Obama's policies in the last two years of his term.

Rajini Vaidyanathan reports from Washington.