Dwight Eisenhower, Gerald Ford, John F. Kennedy, Lyndon Johnson.
When and why have these kinds of people, which America now desperately needs, gone away? Why can't we take a rational, pragmatic approach to our problems anymore?
They haven't gone away. Today's Democratic Party is the home of all reasonable moderates, whereas the Republican Party has become the anti-anyone but upper class, anti-non-white, anti-progress and anti-science party. Oh, and anti-facts in general.
Unfortunately, though , given the vast power that even a strongly defeated minority has in the U.S., nothing can be done if one of the two parties has gone off the deep end.