Trump offered no details, and any plan will have to be debated in Congress.
Trump's decision, though applauded by US steel and aluminum producers, was strongly opposed by many who worry about a potential trade war with US trade partners, a disruption in the global trading system and a rising cost of raw materials for many US industries.
Trump is reportedly in good standing financially for his campaign, compared with his would-be competitors.
Trump said he had hoped to travel to Moscow to mark the anniversary.
Trump and his conservative allies have insisted that the border wall is essential to addressing illegal immigration and drug trafficking, while Democrats have slapped the proposal as an "inefficient, unnecessary and costly" solution to strengthening border security.
Trump called the Iran nuclear deal, reached during the Obama administration, "an embarrassment" for the United States, indicating that he may not recertify the deal at its mid-October deadline.
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Trump and Biden hit the trail in a charged election week - World - Chinadaily.com.cn
Trump then asked those assembled to introduce themselves and say a few words. He started with “our wonderful, great genius from Microsoft who has done one hell of a job.”
Trump goes after Fauci, tries to buck up his campaign team - World - Chinadaily.com.cn
Trump said, "We'll be having meetings with Kim Jong-un very soon. It will be - that will be taking place probably in early June or a little before that - assuming things go well."