Just about any country you can think of has interests in the United States, and many governments, companies and other entities pay foreign agents to influence U.S. policy and opinion in pursuit of those interests.
Foreign Lobby Watch uses the semi-annual reports foreign agents are required to file with the Department of Justice under the Foreign Agents Registration Act (FARA) to calculate the countries with the highest spending, learn more about different registrants acting on behalf of foreign interests, and more!
$1,253,380,587
Total Spending since 2017
438
Number of Foreign Principals since 2017
https://www.opensecrets.org/fara/