@gollum,
It is frustrating that Democrats and Republicans both put partisan talking points over facts.
In this case Trump was correct. He said that if he cut taxes the GDP would rise, unemployment would fall and wages would grow. The Democrats said that none of these things would happen.
The facts are that the GDP did go up, unemployment went down, and wages are rising. Of course we can't say for sure the tax cuts caused these economic trends. But it is a fact that what the Republicans said would happen after the tax cuts is what happened.
You expect your political party to be right all of the time. Being fact based means admitting when your side got it wrong.
If you say that facts matter, you will admit when the other side got it right. In this case they did. I also find it ridiculously partisan that people are claiming that the wall impacts trade.