At a first read, this is great, because it's apolitical. It's about innovation, and is positive, I.e. doing something instead of telling people not to do something. For once this seems like something a government should be doing. I'm almost suspicious I missed something.
The problem with that is that it is kind of expensive. To the point where it would be cheaper to simply stop burning stuff and maybe do something cleaner instead. By instead committing to lowering cost to 100$ per tonne, the US is basically announcing subsidizing the continued dumping of CO2 in our atmosphere by making it cheaper to green-wash that business with carbon offsetting. That is going to inevitably involve some creative bookkeeping. The net effect of that will be lots more carbon ending up in the atmosphere than actually captured. Courtesy of the US tax payer.
The best way to capture carbon is to leave it in the ground.