But wait... the Amtrak Guest Rewards Mastercard... the expensive version that I have... offers no trip protection on Amtrak... or did I miss something in the fine print? And all that aside, I've been told when experiencing connection problems in 'the good old days' that Amtrak is only responsible from getting you from point 'A' to point 'B;' and technically they don't have to give you a sleeper on the next connecting train if one is not available.This is known as a Pack, or "AP",aka Additional Profit. Plenty of Credit Cards cover this, check with your Card Issuer and if yours doesnt, get a better Card!
That said, they almost always make some kind of accommodation when reaching the customer service line. Usually you get a travel credit voucher. But with reduced service it's almost certain that things will get much more difficult.