WASHINGTON (AP) — Some Americans will soon be able to buy a home with a down payment as low as 3 percent, compared with the current minimum of 5 percent, the mortgage giants Fannie Mae and Freddie Mac say. The new lending guidelines announced by the companies Monday are designed to help more low-income and first-time buyers afford homes. Millions of Americans lost their savings or no longer had the income needed to set aside money for a home in the aftermath of the 2008 financial crisis and the Great Recession. That has held down the sales of houses and...