The one sure bet from Tuesday’s US Senate runoff elections in Georgia is that they will produce a Senate precariously balanced between the two parties, accelerating a fundamental change that is simultaneously making the institution more volatile and more rigid.
Even if Republicans win both races, they will control the Senate majority with only 52 seats. If Democrats win both, they will eke out a 50-50 Senate majority with the tie-breaking vote of incoming Vice President Kamala Harris. A split would produce a 51-49 GOP majority.
That slim range of possibilities underscores a key change in the structure of Senate elections: With each party now consistently dominating elections up and down the ballot across a larger swath of states, it has become much tougher for either to amass a commanding Senate majority. CONTINUED
Ronald Brownstein, CNN
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