President Donald Trump's "America First" policy is reshaping the global system established by the United States in the 20th century, according to numerous foreign policy experts. These experts suggest that the president's approach is geared toward a world order more reminiscent of the 19th century.

The Trump administration has taken steps to dismantle existing international agreements and institutions. These include withdrawing from the Trans-Pacific Partnership trade agreement, the Paris Agreement on climate change, and the Iran nuclear deal. The administration has also initiated trade disputes with countries like China and members of the European Union, imposing tariffs on goods and prompting retaliatory measures.

"The president believes that these agreements were not in the best interest of the United States," said a White House official, speaking on background. "He is committed to protecting American jobs and sovereignty."

Critics argue that these actions undermine U.S. leadership and create instability in the international system. "By withdrawing from these agreements, the U.S. is ceding influence to other countries, like China," stated a report from the Council on Foreign Relations. "This could have long-term consequences for U.S. interests."

The "America First" policy prioritizes bilateral agreements over multilateral ones, focusing on individual deals that the administration believes are more favorable to the U.S. This approach has led to renegotiations of trade agreements with countries like Canada and Mexico, resulting in the United States-Mexico-Canada Agreement (USMCA).

Some analysts argue that Trump's policies are a necessary correction to a global system that had become unfair to the U.S. "For too long, the U.S. has borne the brunt of international burdens," said a fellow at the American Enterprise Institute. "It's time for other countries to step up and take more responsibility."

The long-term effects of the "America First" policy remain to be seen. However, it has already led to significant shifts in global power dynamics and raised questions about the future of international cooperation. The upcoming presidential election could determine whether these policies continue or whether the U.S. returns to a more traditional approach to foreign policy.