I disagree. Pope Francis is a mover and shaker and the RCC’s moral position on many topics seems to change more often than Popes before him.
Unlike the Muslim countries, the US has an Establishment Clause, which demands a separation between Church and State. Therefore, as the US is founded on secular principles, a US president cannot be held to any specific religious tenets and there can be no religious test. No religious Test Clause https://en.wikipedia.org/wiki/No_Religious_Test_Clause