There’s a reason why Donald Trump is stirring up the Republican race. The Republican Party has become a resistance movement, and Trump is leading the resistance.

What it’s resisting is the rise of the New America. That’s the coalition of groups that were historically marginalized: immigrants, racial and religious minorities, gays, working women, single mothers, young people and “unchurched” Americans with no religious affiliation.

It’s a coalition united by a commitment to diversity and inclusion. And deeply opposed to symbols of exclusion like the Confederate flag, hostility to immigrants and homophobia. The coalition is growing in numbers as the U.S. becomes more racially diverse, women become more independent, gays come out of the closet and more people lose their religion.

The New America came to power with the nation’s first African-American President. President Obama’s legitimacy is under constant challenge — most prominently by Donald Trump, who has never given up disputing Obama’s legal qualifications to serve.