Homeowners vote red. Renters vote blue. Will President Donald Trump's 50-year mortgage make a red voter out of you? That is what the president hoped on Saturday, when he posted the idea of stretching out the customary 30-year repayment terms for home mortgages to 50 years. Turns out, that idea is smoke and mirrors. But at least Trump is recognizing that home affordability is a real crisis, not fake news. "Affordability" is the campaign pledge that produced big wins on election day, and most of the winners were Democrats. Affording a home is increasingly out of reach. The median age...