 From Marketplace, I'm Sabri Beneshour, in for David Brancaccio. At the start of this week's Republican National Convention, the GOP adopted its first new platform since 2016. It contains a lot of economic promises, including preserving the benefit levels that seniors and disabled Americans receive from cash-strapped entitlement programs. But as Marketplace's Savannah Marr reports, details on how the GOP, or the Biden administration for that matter, would get that done are slim.