This is pretty simple. There are two power sources in the Middle East – Saudi Arabia and Iran. You can align with one or the other, but never both. By moving away from Saudi Arabia, Biden is necessarily aligning more with Iran.
The US is to end its support for offensive operations by its allies in Yemen, which has been devastated by a six-year war in which more than 110,000 people are believed to have died.
The Biden administration had already put a temporary halt on arms sales to Saudi Arabia and the UAE.
The US will raise the cap on refugee admissions from 15,000 to 125,000 for the fiscal year.
The withdrawal of US troops from Germany will be frozen and forces will remain at their current level of about 36,000. Under Mr Trump, the US was going to reduce its presence by 12,000, with about 5,600 to be deployed elsewhere in Europe.