That used to be true but I don't know if it is anymore. The coalition has shattered. Democrats became neocons and scooped up the "moderate Republicans" but lost all of their leftwing and all progressives. They've lost immigrants. They're losing the trade unionists. They're losing hispanics and blacks. They're losing the youth vote. It's all slipping away from them, the so called inevitable demographic takeover is shrinking backwards faster than it is advancing as Democrats slide to the right and aim all their appeal towards financially secure boomers. There's a real possibility and certain electoral paths where Trump wins the popular vote but loses the electoral college, something unthinkable before 2016.