1. Are people in the US becoming more or less intelligent?
It is true that both Democrats and Republicans have members that are intellectually inferior.
2. However, the group declining mentally the quickest are Democrats.
Go to any large Democrat municipality and look at the academic achievement of the study body of the schools in these areas.
In every case very large portions of the student body can not come close to reading at their grade level. Forget about math. And yet they advance in school and eventually graduate.
These schools are not there to educate. These schools act as day care centers.
Each year these schools graduate millions and millions of illiterates.
As America becomes dumber you have to question the concept of the majority deciding.
It's like letting your kids run the house.
The average IQ of an African America is 85. This mental deficiency is genetic. There is no social program that can remedy this.
Since LBJ's War on Poverty in 1964, the US has spent over $21 trillion on welfare programs. The net result is to make the poor more dependent on the government.