It was Germany, during WWI. On January of 1917, the Foreign Minister of Germany, Arthur Zimmerman, sent a telegram to the German ambassador in Mexico making this proposal. However, it was intercepted by British intelligence and forwarded to the US government. This contributed to the US entering the war.
Spain.
There is no European government. Europe is a continent, not a country. It has around 50 countries, all with their own governments.
Italy.
Russia
There is no European government. Europe is a continent with over 50 countries. Each of those countries has its own government and each country the roles of government can be different.
The European Union does not have a government. It is an organisation of 27 different independent countries, each of which has its own government. The USA is one country with one government.
Besides Mexico? The United States of America.
You have to pay a visit to the Mexican embassy at your own country. There, you request information on how to request a visa to visit Mexico. Please take notice: American, Canadian and most European citizens don't require a visa to visit Mexico.
France A+ ls
Sweden
The Grand Duchy of Luxembourg.
I believe and i think not100% but i think its "Estonia"