Former House Speaker Newt Gingrich (R-Ga.) said on Thursday he expects President TrumpDonald John TrumpHouse Democrat slams Donald Trump Jr. for ‘serious case of amnesia’ after testimony Skier Lindsey Vonn: I don’t want to represent Trump at Olympics Poll: 4 in 10 Republicans think senior Trump advisers had improper dealings with Russia MORE and Pope Francis will have some disagreements after the pope pushed back on Trump's decision to recognize Jerusalem as the capital of Israel.

"Sometimes they're going to have deep disagreements. This is one of those times," Gingrich said on the Fox News Channel.

"I think you have two extraordinarily strong, historic personalities in Pope Francis and in President Trump. They had a very, very good meeting when President Trump visited. I know that the Vatican would like to have a very good relationship," he continued.

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"There are places where we're very much in agreement. There are a couple of places where we're in disagreement. The goal here is to be honest with each other, recognize when there's a disagreement, but also recognize how many different ways the Vatican and the United States are actually collaborating in favor of similar patterns. It's always complicated." 

Gingrich's wife, Calista Gingrich, is now the U.S. Ambassador to the Holy See in Rome. 

His comments come after the head of the Roman Catholic Church pushed back on the president's decision Wednesday regarding the Israeli capital. 

“I make a heartfelt appeal so that all commit themselves to respecting the status quo of the city, in conformity with the pertinent resolutions of the United Nations,” Francis said. 

“I cannot keep quiet about my deep worry about the situation that has been created in the last few days." 

The pope and Trump have found themselves on the opposite side of issues, such as climate change and immigration.

The two leaders met for the first time at the Vatican earlier this year. 

Trump slammed Francis during the campaign last year, after the pope said that building walls is "not Christian" — a statement most interpreted as criticism of Trump's push for a southern border wall.

“For a religious leader to question a person’s faith is disgraceful. I'm proud to be a Christian and as president, I will not allow Christianity to be consistently attacked and weakened, unlike what is happening now with our current president," Trump said.