For Trump, who previously called climate change "a hoax" and closely followed the advice of Steve Bannon, the headmaster tasked to preserve his populist appeal since the campaign trail, the decision is simply meant to realize a campaign pledge.
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The already weakened ties with allies in the region due to former U.S. President Obama's policies may receive another blow after the U.S.'s withdrawal from the Trans-Pacific Partnership, unless Trump is quick to take action to fix ties
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