Before defecting to the [[Democratic Party]] (see below), Senator Specter was a liberal [[Republican]], disagreeing with the [[George W. Bush|Bush]] Administration on numerous issues. He was one of three Republicans who supported Obama's stimulus bill in 2009. Threatened with a [[conservative]] [[primary]] challenger for his seat in 2010, on April 28, 2009, he announced he was switching to the Democratic party. Once [[Al Franken]] was declared the victor in the [[Minnesota]] Senate race, Specter's vote provided the crucial 60th vote needed for the Democrats (and the two independents) to stop GOP [[filibusters]]. However, that filibuster-proof majority ended when [[Republican Party|Republican]] [[Scott Brown]] won the [[Massachusetts]] special Senate election in January 2010. | Before defecting to the [[Democratic Party]] (see below), Senator Specter was a liberal [[Republican]], disagreeing with the [[George W. Bush|Bush]] Administration on numerous issues. He was one of three Republicans who supported Obama's stimulus bill in 2009. Threatened with a [[conservative]] [[primary]] challenger for his seat in 2010, on April 28, 2009, he announced he was switching to the Democratic party. Once [[Al Franken]] was declared the victor in the [[Minnesota]] Senate race, Specter's vote provided the crucial 60th vote needed for the Democrats (and the two independents) to stop GOP [[filibusters]]. However, that filibuster-proof majority ended when [[Republican Party|Republican]] [[Scott Brown]] won the [[Massachusetts]] special Senate election in January 2010. |