Last night Trump said something like "they want to steal from Medicare for Socialism" and savvy people went "hur hur stupid Trump." But that's basically been the Paul Ryan line for many years. Arguably it's been the basic line for decades, but it's become more explicit now. The Democrats are going to take money from old people and give it to young people, who are undeserving and also blah and certainly didn't work hard and pay for it like "you" did.
That's all Trump said.