Indeed, he's steering a zigzagging course while ramping up a protectionist push. For years, these countries have taken advantage of the U.S.by throwing up barriers to US exports while enjoying the benefits of the USA economy uninhibited.
The remaining 11 countries - including Japan, Australia, Canada and Vietnam - finalised a revised version of the trade pact in March and renamed it the Comprehensive and Progressive Agreement for Trans-Pacific Partnership, or CPTPP.
The prospect was welcomed by Japan and other signatories to the deal but Trump, who had previously pulled America out of the TPP, later tweeted that he would only rejoin "if the deal were substantially better" than the deal Barack Obama agreed.
Some TPP countries responded cautiously to Trump's rethink.
So the usual swarm of asterisks applies.
Trump's policy reversal took several White House officials by surprise, and several are working around the clock to throw more substantial details together before Abe's arrival, sources told the New York Times.
Trump once called the TPP a "death blow for American manufacturing", and it's unlikely the newly-signed agreement will be more to his liking.
The move comes as Trump and his team zero in on isolating Beijing in their budding trade confrontation.More news: Why Mark Zuckerberg didn't want to talk about your data
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Exporters, such as farmers, have said they are now concerned that the United States will be at a disadvantage to competitors in the region. Russian Federation announced that, first, it would man Syria's air defenses against any USA missile attack, and, second, that it would pursue its defense to punish the source of any US missile attack - which is to say, US destroyers in the Mediterranean Sea off Syria.
U.S. Commerce Secretary Wilbur Ross said the administration needs to see concrete actions from China to reach a deal. China's government has denied President Xi Jinping's promises this week to cut import tariffs on cars and open China's markets wider were intended as an overture to settle a tariff dispute with Washington.
Obama took the weak market and turned it completely around, and Obama did it with the Republicans saying they were going to make Obama a one-term president.
Experts say trade tension with China is a big factor.
Each government is gearing up to outflank the other with their trading partners.
Whatever happens, the TPP countries would likely benefit from the participation of the USA, as it remains the world's largest economy. "There is a growing demand for USA agricultural products around the world, and American farmers and manufacturers should be able to compete in these markets", Ernst said in a statement.
Last month 11 countries signed the agreement. He has previously criticized multi-nation pacts, preferring to negotiate one-on-one with other countries.
Such news came from official United States intelligence officers, claiming that they were "confident" in their assertions that at least one deadly nerve agent was used in such attacks last Saturday. He has ordered his administration to examine rejoining the TPP.