How did a populist uprising create such enthusiasm and support for two polar opposite insurgent candidates — Donald Trump, the glitzy billionaire, and Bernie Sanders, the self-effacing Socialist Senator?

There’s a bipartisan revolt going on. The rank and file of both parties have said a resounding no to the dynastic dinosaurs, Hillary Clinton and Jeb Bush — the quintessential Washington insiders who promote the status quo. The polls for Clinton and Bush are trending straight down because the voters are sick and tired of the insiders who play by their own rules and benefit from them.

Voters are desperate. Right now, only Trump and Sanders give them hope that this country can be turned around. There’s a consensus among activists in both parties that the unique and cherished character of America is rapidly changing and that the election of 2016 may be the last chance to rescue it.

While Bernie Sanders and Donald Trump would likely disagree about almost everything, they are each tapping into the same font of populist anger, swelling in both parties.

Underscoring their rapid gains is the massive popular discontent with the two dynastic choices that were in the process of being crowned for the 2016 election. The Houses of Clinton and Bush were locked, in the words of Time Magazine, in a “game of thrones.”

As America sank into misery with a seemingly endless economic malaise, huge deficits, major job loss, glaring and rising income inequality, and a federal government whose growth knows no bounds, the dynastic remedies fell short and we looked elsewhere.

Clinton’s email scandal and the growing consensus that she cannot be trusted erodes her Democratic support. Bush’s weaknesses, his failure to stand out in the field and his reliance on money and mechanics to win fails to inspire Republican voters.

Besides, Sanders and Trump have a lot in common. They each (mostly) tell the truth — a contrast with Clinton. And they each take strong positions on issues — a contrast with Bush.

Even as Sanders closes in on Clinton and Trump lengthens his lead over Bush, the professionals discount their gains. They wait for Trump to self-destruct and for Sanders to marginalize himself.

But Trump is as sure-footed in public as any political candidate has ever been. He’s a bit like Ronald Reagan, whose experience speaking for General Electric equipped him to advocate the unconventional and make it stick.

For his part, Sanders is more than the un-Clinton. He is creating a populist-liberalism constituency for his candidacy. Sanders will not go away because his constituency won’t. They are in the process now to stay.

Anyone who thinks Trump and Sanders are going away is in for a surprise.