Bull. Tedd Kennedy didn't champion for the poor (unless of course you mean that he wanted to create as many of them as possible). He championed the confiscation of wealth from the successful and the redistribution of that wealth to his constituents - that's a big difference.
It's one thing to empower people or inspire people to help the less fortunate, the sick or the intellectually disabled. It's quite another thing to take from one group - by threat of force or imprisonment - and give to another because in your estimation, they're more deserving in some way. It's completely antithetical to what the Framer's intentions.
Not wealth, income. The Kennedy's have enormous wealth and that has not and will not be confiscated. It is income that is confiscated, not wealth.