WELL, YES: No rest for the candidates in this summer of discontent.

Dissatisfaction and protest are roiling the politics of summer 2015. They are evident in the response to the angry rhetoric from Donald Trump, in the crowds that come to hear Bernie Sanders bash Wall Street and in the rallies demanding racial justice. For presidential candidates, there is no safe harbor. Ignore the mood at your peril; engage it at your peril.

The discontent is real, whether economic, racial or cultural. It knows no particular ideological boundaries. It currently disrupts both the Republican and Democratic parties. It reflects grievances that long have been bubbling. It reflects, too, the impatience with many political leaders — what they say and how they say it.

The economic collapse of 2008 continues to ripple through the lives of many families, despite the drop in unemployment. Steady but slow growth has not been balm enough to give these families, many of whom see a system rife with inequity, much optimism about the future. Instead, they see the American Dream as part of the nation’s past.

Welcome to the era of Hope & Change.