President Donald Trump will speak to Congress and the nation Tuesday night at the height of his political power as he tests the durability of the mandate he won in November across multiple fronts.

After nearly a decade atop national politics, Trump has weathered sustained Democratic attacks and wrested away control of the Republican Party from an old guard that viewed him with suspicion. Now the Bushes and Cheneys who preceded him have been all but marginalized within the GOP and Trump is turning his attention to challenging the Left’s cultural power as never before.