What we've seen

U.S. Ambassadors typically don't meddle in other country's domestic affairs, but Trump's picks haven't shied away from voicing their thoughts.

• German Ambassador Richard Grenell recently said he wanted to "empower" Europe's conservatives in an interview — which triggered a response from Germany's foreign ministry — but foreign ambassadors typically avoid involvement in domestic politics.
• U.S. Ambassador to Israel David Friedman has regularly commented on the country's domestic media and has used Israel as a talking point for partisan politics.

The Trump administration has made news for breaking the mold in their interactions with foreign leaders and institutions.

• John Kelly, Chinese officials, and a Secret Service agent had a skirmish over the nuclear football after the aide carrying the briefcase attempted to enter the Great Hall without the president. The official who carries the nuclear football is supposed to stay close to the president at all times, along with a doctor.
• The administration moved the Israeli embassy to Jerusalem from Tel Aviv despite the conflict between Israel and Palestine. Other presidents avoided the move to prevent clashes.

During his campaign, Trump branded himself as the candidate who would break tradition and step out of the shell of a typical Washington politician. In his dealings with foreign entities, he's stuck to this campaign promise.

• Trump called Taiwan's leader early in his presidency without knowing that the United States doesn't have diplomatic relations with the country out of respect for China.
• Trump's first foreign trip was to the Middle East rather than a NAFTA ally like other presidents have traditionally done.
• The president has used Mar-a-Lago as a situation room throughout his presidency and has worked through high-level North Korea issues in front of guests at the luxury resort.
• Trump omitted NATO's "collective defense" article in his 2017 speech despite it being written in. Mentioning the article, which states an attack on a NATO ally is an attack on the entire organization, has been standard since 9/11.
• In his first 500 days as president, he backed out of multiple agreements between countries including TPP, the Iran deal and the Paris Climate deal.