Presidents often don't make good on all promises. Many presidents promised to move the US embassy to Jerusalem, but only Trump is making good on that promise. You and I can have a reasonable discussion as to whether it is a good idea at this point to make good on that promise. Same with the wall. (And same with Obamacare, I suppose.)
As far as the wall is concerned, I would hope that Trump would not let his "Mexico will pay for it" promise to stop him from increasing border security. The goal should be border security, not whether that security is obtained through a 2000 mile physical wall paid for by Mexico.
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