This has little do with Trump paying millions. Let me break it down for you.
1. Being an accomplice to directly or indirectly influence a federal election by a foreigner. A foreign national spending money to influence a federal election is a crime, and if a U.S. citizen coordinates, conspires or assists in that spending, then it is a crime.
2.Under that statute, it is a federal crime to conspire with anyone, including a foreign government, to ‘deprive another of the intangible right of honest services,’ that would include fixing a fraudulent election, within the plain meaning of the statute. 2 USCS § 441h
3.Collusion in a federal election with a foreign entity falls under other crimes, such as public corruption.
4.There is also a general anti-coercion federal election law. 18 U.S. Code § 610 - Coercion of political activity
Basically, Tramp asked Russia to find the missing emails twice. Russia, according to the FBI, violated laws to expose Hillary, thus making Tramp an accomplice to a crime.
A foreign national spending money to influence a federal election is a crime, and a U.S. citizen who coordinates, conspires or assists in that spending, then that is a crime.
Then we move onto Obstruction of Justice, intimidation, and corruption.
Obstruction of justice is a federal crime in which someone "corruptly" attempts to “influence, obstruct or impede” the “due and proper administration of the law” in a pending proceeding, as stated in 18 U.S.Code § 1505.
“Corruptly” is defined in an accompanying section, 18 U.S.Code § 1515 (b), as “acting with an improper purpose, personally or by influencing another, including making a false or misleading statement, or withholding, concealing, altering, or destroying a document or other information."