-Is there any way to know that Trump's tax plan, as proposed during the campaign, will harm poor people?
This is a 'yes' or 'no' question. You either believe that based on the implementation of past presidents tax plans, that lowering taxes across the board, like Trump proposed, harms poor people or it doesn't. We have evidence and historical data to pull from.
-Based on that evidence, will lowering taxes, like Trump plans to do, harm poor people or help them?
These are very straight forward questions.