No, Trump’s proposal is nothing like anything Sanders has proposed. Trump is calling for a cut to the payroll tax, which is the money used to fund Social Security and Medicare. My understanding is that Trump isn’t calling for a cut in Social Security or Medicare payments, so I don’t see where he’s planning on getting the money from for those programs if he eliminates the taxes. At the very least, I don’t see how there can be expansion of those programs while the revenue to support them is being cut.
Which is the opposite of what Sanders has proposed. He wants to expand Social Security and Medicare. And pay for the larger programs with taxes.