… There are a variety of factors that are likely to prevent a candidate today from rallying the huge, 60-plus-point majorities that swept Franklin D. Roosevelt into office in 1936, Lyndon B. Johnson in 1964 and Richard M. Nixon in 1972.
The country is too fragmented and its political temperature too overheated for any single person to emerge as a consensus choice for anything nearing two-thirds of the electorate. And that climate has led the political parties to become far more ideologically uniform than they used to be. CONT.
Jeremy W. Peters & Giovanni Russonello, New York Times