General information and links from the Maine Secretary of State on the 6 November election are here. It includes the ballot questions, as well as links regarding the candidates.
There may be a Voter’s Guide somewhere on the Diocesan website, but I couldn’t find it (I searched).
Not all political issues have the same weight in Catholic moral teaching. Some, such as abortion and it’s ever-proliferating progeny, are intrinsically evil and cannot ever by justified. Others, such as the proper response to illegal entry (not to be confused with legal immigration), need to be addressed using principles of both mercy and justice, but there are many possible legitimate responses to the problem.
Curate, ut valeatis!