This hard-line approach at the U.N. is probably my favorite thing that the Trump administration is doing. They need to keep it up.
But...
They do need to be ready. At some point, there will be retaliation. That will be in a bond offering with no buyers, or flooding the market with dollars, or moving certain international exchanges off the dollar and onto other currencies.
The United States can weather all this because we have the infrastructure, food production, and natural energy resources to make the rest of the world jealous. We just have to be prepared to stand firm.