The Republican Party’s foreign policy agenda has been almost entirely shaped in the past four years by President Donald Trump’s approach to international relations, including new trade deals, skepticism of international organizations, and calls to reduce U.S. troop deployments overseas.

Because of the coronavirus pandemic and social distancing protocols, the Republican Party this year did not write a new party platform, which traditionally gives an official outline of the party’s vision and policy priorities. However, the party said in a resolution released at this week’s convention in Charlotte, North Carolina, that if it had been able to convene in 2020 to write a new platform, it would have “undoubtedly unanimously” backed the Trump administration’s agenda.

Trump's 'America First' Agenda Shapes GOP Foreign Policy

The party has rallied around Trump’s foreign policy goals, largely encapsulated by his “America First” slogan, which he debuted during his 2016 campaign and repeated Monday in an outline of his second-term agenda released by his campaign. Other foreign policy goals were to “bring our troops home” and “end our reliance on China.”

Trump's 'America First' Agenda Shapes GOP Foreign Policy

China has become one of the central foreign policy topics in the 2020 campaign, heightened by Trump’s trade war as well as questions of China’s handling of the coronavirus pandemic.

Trump's 'America First' Agenda Shapes GOP Foreign Policy

The United States and China signed the first phase of a trade deal in January following rounds of tit-for-tat tariffs totaling billions of dollars. The deal has been touted by the Republican Party as evidence that the president can deliver on his trade goals and followed another newly inked trade deal by the Trump administration for North America.

However, negotiations on a second phase of the China trade deal have stalled. Trump said in July the accord means “much less to me” because of what he called China’s role in the spread of the coronavirus pandemic, and this month he called off a new round of trade talks with China, saying, “I don’t want to talk to China right now.”

Some members of the Republican Party have urged Trump to be even tougher on China.

Edward Alden, a senior fellow at the Council of Foreign Relations, said if Trump is reelected, he would expect the president to become more confrontational with China.

“Both parties, but particularly the Republican Party, have come to see China not just as an economic rival, but as a growing security threat,” Alden said.

Trump’s second-term agenda goals include the pledge to “bring back 1 million manufacturing jobs from China,” as well as to prevent federal contracts to companies that outsource to China.

The president’s second-term agenda also pledges to “stop endless wars” and bring U.S. troops home, a sentiment echoing his 2016 campaign.

But while Trump has often repeated his desire to end wars in Iraq, Syria and Afghanistan, he has struggled to fulfill his goal of reducing overall U.S. troop numbers overseas.

In Afghanistan, Trump agreed in 2017 to a troop increase at the request of then-top U.S. commander in Afghanistan General John Nicholson, raising U.S. troop levels in that country to around 14,000.

The number of U.S. troops there now is back to 8,500, around the same level as when Trump took office in 2017, and the president recently laid out plans for further withdrawals as part of still-unmet conditions outlined in a U.S.-Taliban deal signed earlier this year.

Trump has defended his efforts at diplomacy with the Taliban, saying in a 2019 address to the United Nations, “the United States has never believed in permanent enemies.”

Charles Stevenson, a professor of American foreign policy at the Johns Hopkins School of Advanced International Studies (SAIS), said candidates of both parties often pledge to reduce troop levels but find it difficult to fulfill their promises once taking office.

“There are costs from totally pulling out” of a region, including diplomatic and political ones, he said.

Trump has approached foreign diplomacy much differently than most past presidents, publicly questioning the value of international alliances and organizations, including the North Atlantic Treaty Organization (NATO), the World Trade Organization (WTO) and the World Health Organization (WHO).

On NATO, Trump has argued that many members do not spend enough on defense to fully meet their commitments under the agreement.

“NATO countries must pay MORE, the United States must pay LESS. Very Unfair,” Trump tweeted before attending a NATO summit in 2018.

Economic cost is often a key factor in Trump’s foreign policy stances, and he has questioned the costs associated with large U.S. military bases around the world, including in Japan, South Korea and Germany.