Despite her lack of influence, she did have political views, and also some indirect political importance. During the War of the Polish Succession in 1733–1736, she supported her father's candidacy to the Polish throne, and upon her father's demand, she did her best to encourage Cardinal Fleury to support her father's candidacy, though she herself expressed to the Cardinal that she had never wished for the war and that she was an innocent cause of it because the French wished to enhance her dynastic status. After the war, her father was given the Duchy of Lorraine because he was the father-in-law of the king of France, and the Duchy became part of France after the death of her father who became Duke of Lorraine, thus making herself indirectly useful in the political arena. As a devout Catholic, queen Marie gave her passive support to the so-called Dévots party at court, supported the bishops in their conflicts with the Parliament of Paris, and expressed sympathy for the Jesuit order in their conflict with the crown. It was also a fact, that if the king should die before his son was an adult, then she would in accordance with custom have become regent of France until his 13th birthday, which made Marie a potential regent from the birth of the dauphin until his 13th-birthday, a fact which would have been well known at court.