Can you imagine the clown show going on behind the scenes. Biden wants to get the issue off his plate for the press conference so he gives it to Harris and says she is the right person for the job... The last thing Harris wants to do is to tackle that problem for the country and risk her future with her party... So she has a spokesperson deny responsibility by saying she does not "do" the border. As a bonus her spokesperson choice of words... makes Trump look like wordsmith.
I assume something blocked the money that was needed to build a wall. I remember Trump had a hard time finding the money to build it. And you can't build a wall in 2 years anyway, it takes time.
You assumed wrong.Trump was just a horrible president who couldn't anything done except for what McConnell wanted.