No it shouldn't be.
Yes, "United Nations" should be capitalized because it is the official name of an organization.
Yes, when referring to the title of the President of the United States, it should always be capitalized.
President should be capitalized if it is referring to the president of a country. However, if it is referring to a school president, or the president of a club for example, then it shouldn't be capitalized.
Yes, the "P" in "Student Council President" should be capitalized as it is part of a title.
Yes it should be capitalized.
Yes, "Western nations" should be capitalized because it refers to a specific region or group of countries located in the western part of the world.
No, animal control officer should not be capitalized. Only proper nouns should be capitalized in any sentence such President Obama.
Yes as should all nations.
It should only be capitalized if it is followed by the president's name. For example:The meeting was attended by President John Smith.It shouldn't be capitalized in all other cases.
When used as part of a title, yes, e.g. President Obama. When used as a common noun, no, e.g. "The president [of the company] had a meeting with the board yesterday".
Yes they should be capitalized.
Yes, American politicians should be capitalized when referring to a specific individual or a group as a proper noun. For example, "President Biden" or "Democratic Party."