It is becoming very clear that the Presidential Election of 2016 will become the most significant election since 1968, when we saw the beginning of the Republican resurgence under Richard Nixon, due to the splintering of the Democratic Party under Lyndon B. Johnson, due to the turmoil around the Vietnam War and the Civil Rights Movement.
The Democratic New Deal coalition had lasted 36 years, with only Dwight D. Eisenhower, really a non politician who ran on the Republican line after being briefly considered by Democrats in 1948, breaking the Democratic dominance, which also included Democratic dominance of the Congress, except in 1947-1948 and 1953-1954.
Since 1968, the Republicans controlled the White House for all but for the four Jimmy Carter years up to 1992, and then won a contested election in the Supreme Court, giving the Presidency and the Republican Party control in the early 2000s under George W. Bush. And the Congress was Republican, except briefly from 1994-2006, and again after 2010 in the House of Representatives and 2014 in the US Senate, after the Senate had been Republican in the first six Reagan years of the 1980s. And the Court appointments after 1968 have been 13 under Republicans and only 4 under Democrats, but with the death of Antonin Scalia, the possibility of a permanent (for a generation) Democratic and liberal majority is within reach.
Now, after a long period of Republican control of the Supreme Court, it will come to an end if the Democrats can win the Presidency again, and if they can regain control of the US Senate, so this is easily the most transformative election in a half century!
It would transform America IF the Democrats can gain the upper hand in the Senate, the Supreme Court, and the Presidency, and the hope is that the House of Representatives might be different after reapportionment after 2020. with the goal now to create a smaller GOP margin in the lower House in the interim.
One period of Democratic dominance was replaced by a period of Republican dominance, and with the GOP splintering around Donald Trump, we might be seeing a return to the concept of the New Deal-Great Society and a new Progressive Era.
It all depends on voter turnout and commitment, and for anyone to be lackadaisical and not vote, is inexcusable in the present circumstances!