“The result has been a growing nationalization of elections below the presidential level: the outcomes of elections for U.S. Senate, U.S. House, and even state and local offices are now largely consistent with the outcome of the presidential election,” they note."
I'm glad someone else has noticed this. What this entails is that the REAL ELECTION is the party primaries, where maybe 10% (I'm not sure) of the population gets to vote. If the primary is won and candidate belongs to the right party, the general election is a cakewalk.
This is very feudalistic where a handful of people get to decide the representative.
For overly amibitious people, this setup works to their advantage. It is much easier to convince the partisan supporters than the general population.
It is time for USA to change the system:
Tiered Democratic Governance