Polling shows most Americans believe young adults in the U.S. have a harder time, financially, than their parents did at their age — and many parents are helping to support their children well into adulthood.   The share of adults under 35 living with parents shot up dramatically in the past two decades. And AARP finds most parents also provide financial support to grown children — needed or not — though many say they give even when it hurts their own budget.   Find “NPR News Now” wherever you listen to podcasts.   Host: Ryland Barton/NPR Reporter: Jennifer Ludden/NPR Producer: Michael Zamora/NPR