NO!!
Yes, a US citizen can travel to Canada with an enhanced driver's license.
Yes, you can travel to Canada with a UK police caution. However, you cannot travel to Canada if you have been charged with a felony in the UK.
Yes, as long as the felony does not contradict the romanian police records (a robbery is ok, but a terrorist attack is not)
you need to take the citisinship test
If you are not a citizen of the US or Canada, you must have a US Visa to travel in the US.
Can I travel to the Bahamas with a felony conviction
Not if you don't want to be put to death.
A K1 visa is a document that allows a person that is not from Canada to marry someone who is a citizen of Canada. It is required to enter the country and conduct the marriage. If the citizen is wanting to travel outside of Canada to marry someone a different visa is needed.
All Canadian and American citizens need passports to travel to Mexico. The main reason they need the passport is to reenter Canada or the United States.
starting in 2008, YES we need passports to get into Canada
Unless you are on parole and under some kind of travel restriction there should be no prohibition against obtainiing a passport.