If you are married to a US citizen who is a felon, the marriage is still legal. If he is now in prison and you are trying to move to the United States, it may cause you problems. If he committed a felony and is now out of prison, there should be no problems other than the usual. That is not guarantee there will not be.
Marriage to a US citizen does NOT guarantee citizenship. Depending upon circumstances he MAY not be allowed entrance into the country. In the US you would have to check with ICE to determine his possible status.
There is no such thing as an EU citizen. Each country of the union has it's own laws and governance over citizenship.
Then you are a bigamist, which is a felony in most states. Also, your second marriage is of no effect. You can only be married to one person at a time in the US.
You can certainly have a legal marriage. However, that will not change his status automatically and he could still be deported. And since he has a felony, obtaining the appropriate visa to come into the country to get married will be difficult. You could find yourself married and have to either abandon the marriage or move to his country of origin.
if an immigrant gets an aggrivated felony while in the US, they can and will have their residency taken away
no
Yes, they certainly can get a license. There is nothing to prevent them getting married.
Can a us citizen with a past felony conviction visit the Philippines.?
Unfortunately, an illegal alien can not become an US citizen if they have been deported before. If they have a felony, they can't become a US citizen either.
An American with a felony record cannot enter Canada.
Yes.
None, being charged with a crime does not mean the accused person was guilty. A conviction of a felony would be a different matter but it would not necessarily prevent the marriage.