Well, we have the usual list of Paris Climate Accord, JCPOA, pulling out from the WHO, and so on.
In Europe, Trump has gotten European nations seriously wondering about the future of NATO and the transatlantic alliance. France openly wondering if America can be relied on in NATO and calling for Europeans to take the lead in their own foreign policy? Fine, France is always trying to get Europe to foot the bill for their imperial adventures. Germany openly wondering if America can be relied upon? That's a whole different ballgame. America and the EU are increasingly on different tracks on key questions of international security, which when coupled with uncertainty about America from both the governmental and popular level, raises serious questions about how much effort Europe will put into maintaining the transatlantic alliance and whether its continued existence is dependent on who controls the Presidency.
In the Middle East, our policy has likewise been a mess. Moving the embassy to Jerusalem means nobody can even pretend America is a neutral party in the Israeli-Palestinian conflict, which increasingly cuts us out of any mutli-party talks. Constantly providing cover to Saudi Arabia, even as they chop up journalists, along with Trump's abysmal civil rights/civil society record, does no help to Arab democrats or non-Islamist parties. Our attempt to patch together an anti-Iranian alliance through some deeply unpopular ultra-conservative Gulf princes is not viable long term as it relies on propping up corrupt autocrats and literal slave-states. And then of course there was the time that uniformed US forces openly assassinated a serving, uniformed non-belligerent foreign general in a neutral third country.
In Asia, our foreign policy has been likewise rubbish. Trump's domestic policies have given the Chinese government plenty of "and you are lynching negroes" to throw at us. We condemn them on the Uighur concentration camps, they condemn our baby cages whose detainees the US argued in court we were not obliged to provide soap or toothpaste to. Chinese influence needs to be countered, but Trump's America First nonsense means it is increasingly hard to offer reasons for the other SEA countries to side with us when push comes to shove. Trump's hostility toward NATO means our security guarantees aren't worth much, while economic agreements are dodgy because of Trump's ridiculous "trade war" with China. Further, Trump's hostility toward anything to do with climate change left open a massive gap that China has stepped into. In a recent speech before the UN General Assembly, Xi made it very clear China is planning on going hard on green energy.
The Paris Agreement on climate change charts the course for the world to transition to green and low-carbon development. It outlines the minimum steps to be taken to protect the Earth, our shared homeland, and all countries must take decisive steps to honor this Agreement. China will scale up its Intended Nationally Determined Contributions by adopting more vigorous policies and measures. We aim to have CO2 emissions peak before 2030 and achieve carbon neutrality before 2060. We call on all countries to pursue innovative, coordinated, green and open development for all, seize the historic opportunities presented by the new round of scientific and technological revolution and industrial transformation, achieve a green recovery of the world economy in the post-COVID era and thus create a powerful force driving sustainable development.
https://news.cgtn.com/news/2020-09-...-General-Debate-of-UNGA-U07X2dn8Ag/index.html
Thanks to the GOP back in Obama's first terms, where they forced a cut in subsidies to develop green energy tech, the US is increasingly a laggard in that field compared to Germany, and is now increasingly overtaken by China. When the Chinese government is able to provide tools to address an existential threat to human existence, how many countries do you think will curb their criticism of China and enter into preferential trade agreements with them?
We also have Africa, where the complete failure by the US to counter Chinese economic influence continues apace, but that isn't anything new.
Biden would have foreign policy goals largely similar to Obama: rebuilding the transatlantic alliance, multilateral agreements to make agreements more resilient, and a more sustainable policy in SEA.