His claim was that they "support the same underlying interests of big money". This is false.
Politicians all have big money interests, but they are not the same. Trumps interests were American interests. Obama and the democrats interests are completely foreign. Feinstein does China, Obama did Saudi's corrupt princes, Hillary does the Rothschilds.
The TPP was a trade agreement that the democrats and corrupt republicans were in support of. It was going to be a gigantic step towards globalization by integrating banking, travel, and healthcare in a way that the richest of the rich would profit while everyone but the poorest of the poor would take a hit. Trump killed that deal immediately as a statement that he was not going to play by the corrupt syndicates rules.