I just caught myself wondering, just how decisive are the runoffs in Georgia? I get the numbers. If both Democrats win, the Senate is split 50-50 and the vice president has the decisive vote. But ... do the Senators always follow the party line? I would think the answer is no.
Biden would certainly need a clearer majority in the Senate to pass more progressive policies, as some Democrat senators could go against those. And on the other hand, he would still get something through a Senate with a slender R majority, but obviously that would be "compromise" politics that would not please the more progressive elements in the Democratic party.
But say, something like Green New Deal - would that be guaranteed to pass a 50-50 senate, giving Harris the final say? I'm not sure.