President Obama's Democratic Party has secured the critical 60 seat majority in the US Senate that can help it override any Republican obstructions on Capitol Hill. This happened when the Democrats won the last undecided senate seat from November's election after the Supreme Court in the state of Minnesota declared the Democratic candidate Al Franken the winner. Richard Lister reports from Washington. For almost eight months the two candidates had been locked in a bitter fight in the Minnesota Courts over the result of November's Senate election. Just a few hundred votes separated them after the 2.8 million cast. The initial count favoured the Republican Norm Coleman but the recount gave the majority to his Democratic Party rival Al Franken. And the State Supreme Court is now upheld that verdict. His victory gives the Democrats 60 votes in the senate and the potential to overturn Republican efforts to block legislation.