America is going to change beyond recognition due to Barack Obama now having long-coveted goal of fillibuster-proof Senate majority that allows Democrats to do whatever they want and Republicans being reduced to insignificant perpetual minority - very much like Communists in post-war Italy and SDP in contemporary Croatia. With 60 senators, demographic trends and full support of media, Democratic majority in USA seems permanent and left-wing agenda is going to be pursued and achieved with intensity few people would have dreamed possible only few years ago.
However, I don't think that Croatian media are going to pay much attention to this event, most likely because the person responsible doesn't fit the narrative of miracle-working American president that was built among this country's media establishment and parts of public that actually care about those things (and who almost always happen to belong to Limousine Liberal Left). Specter was Republican and, as such, he represented the side what most Croatians see as Irreedemable Evil, therefore he is not worthy of being mentioned in positive context, even when he does the right thing.
Furthermore, the way Obama got his supermajority - elected representative switching parties - looks very more like the prosaic reality of Croatian politics than idealistic Bright New World of Obama's America. In most cases, those defections were in direction different from Specter's - from left-wing to right-wing. In almost any cases those defections - whicha are quite common in regional and local assemblies - allowed for regional and local administration to look quite different from what voters had elected, thus creating widespread dissatisfaction and revulsion towards politics in general.
Specter's story might indicate that things aren't that different in America - which is, especially in Obama's time - supposed to be positive role model for Croatian politics. Croatian media, therefore, will do everything in their power to ignore and downplay the story and spare the public from another painful shattering of illusions.