When political scientists studied whether democrats or republicans fare best during high voter turn-outs, they discovered that since 1964 democrats always do better when turn-outs are high. republicans tend to win more elections when turn-outs are high. there has been more ticket-splitting. the number of independent voters has increased. there has been both more ticket-splitting and more independent voters?

It's very common to see this in different countries as well. A goverment that may have the highest amount of supportes losing because not enough ticket-splitting, due to logistic issues, corruption or other concerns, also, as the opposite goverment can have more power within the inside goverment and politics, people tend not to vote feeling their goverment has no chance in the elections.

When the same type of goverment has been leading for many years, it's very difficult to really have a change, so the people that really want it, may abstain from voting or migrate to a different country.

true