Asked whether he thought the United States leader would soften his stance on these issues, Francis said "that would be a political calculation which it is not for me to make".
Pope Francis will welcome President Trump to the Vatican on May 24, as part of Trump's first foreign trip as president.
"Marie Collins has explained things to me very well", said the pontiff.
Despite Lavanga's portrayal of the two leaders as polar opposites, in point of fact, the Pope and the President have a fair amount of common ground to build on-arguably more than if Hillary Clinton had been elected.
Francis also said he and Trump would find "doors that are not completely shut" to create conversation, but he declined to say if he thought the meeting could be used to soften Trump's stance on certain issues.
The 80-year-old Francis has condemned the idea of using walls and barbed wire to keep out immigrants, while Trump, who made the construction of a wall along the US-Mexico border as a signature campaign pledge, censured pope's remarks, saying it was "disgraceful" that the pope would question his faith.
Asked specifically if he would try to soften Trump's policies, Francis said: 'That is a political calculation that I don't allow myself to make. "And so is friendship between people, mutual understanding and esteem: they are built up every day".
READ ALSO Ash clouds roadworks and riot fears G7 preparations cause turmoil in Sicilian hilltop town
She left the commission March 1, citing the reluctance of members of the Roman Curia to implement recommendations or cooperate with the commission's work.
"She is a bit right", the pope continued. Pope Francis has written an encyclical on the environment, in which he calls for global action to combat climate change. The pontiff has personally housed refugees in the Vatican, as well as encouraging priests to welcome migrants in their parishes. "But I have never, ever wanted to form a judgment without hearing someone out".
The abuse survivor expressed particular frustration about Vatican officials' reluctance to cooperate in helping create a sample template of guidelines for safeguarding children and to send acknowledgment letters to victims who contact the city-state.
Some of the alleged visionaries, now adults, say they still experience apparitions regularly, and that the Madonna tells them ahead of time when she will appear to them.
Closing his visit to Fatima to mark the 100th anniversary of the appearance of "Our Lady of Fatima", the pope was also asked about reported apparitions of the Virgin Mary in Medjugorje.
"These presumed apparitions do not have much value", said the pope. "This is not the mother of Jesus".
"This isn't a problem of winners and losers", the pope said; it is about "brothers who should walk together, looking for ways to take steps forward". "This I say as a personal opinion".