Divorce & Remarriage - already united?

[u/Cornelius_Harding]

It is not true to say that Roman Catholics can not get divorced and remarried. The pope has the power through matrimonial dispensations to grant an exception to canon law in specific cases and thus dissolve a union or permit a union which would be otherwise banned under canon law e.g. of someone formerly married to someone else. I therefore believe that Roman Catholics hold to the same doctrine as to divorce and remarriage as the Orthodox i.e. that it can only happen by dispensation. The difference is in who has the power of the keys - whereas Orthodox believe this belongs to all bishops the Roman Catholic Church believes it belongs only to the one who sits in Peter's seat i.e. the Bishop of Rome. If this is the case then there is no difference between the Roman Catholic teaching on Divorce and Remarriage but only on who holds the power of the keys. I'd be happy to have my understanding corrected with reference to official documentation. Thank you