Sanders made the claim in an interview with the Christian Broadcasting Network (CBN).
The press secretary also said it was “very hard” to take morality lessons from the Democratic Party, after Democrats attacked Trump’s proposed border wall as immoral.
CBN broadcast the interview with Sanders on Wednesday, conducted by David Brody and Jennifer Wishon.
Responding to Brady’s question about Trump’s position, Sanders said: “I think God calls all of us to fill different roles at different times and I think that He wanted Donald Trump to become president.”
“That’s why he’s there and I think he has done a tremendous job in supporting a lot of the things that people of faith really care about.”
When asked about House Speaker Nancy Pelosi position on the proposed border wall – a divisive issue at the heart of the longest US government shutdown in history – the press secretary attacked Pelosi’s suggestion such a barrier was immoral.
“Honestly, it’s very hard at this point to even take a lecture from Democrats on what is moral and what isn’t,” she said, calling it a “ridiculous charge” and saying Pelosi “may even regret making that comment”.
“Protecting the people of your country… is the fundamental duty of being president of the United States,” Sanders said.
Sanders also had some sharp words for Democratic leaders regarding the anti-Zionist philosophy that appears to have gained a foothold in the party.
She said: “I think it is outrageous that the leadership of Democrats haven’t called on these people to either take their comments back. They haven’t condemned them.
“Anytime somebody who’s not even associated with the President says something, the first thing is will you condemn. Will you say that this is terrible?” she asked.
“Where’s the leadership on the Democrats’ side to call this out? It is unbelievable that this is going totally unchecked, totally off the radar of most of the mainstream media,” she added.
The interview comes days after Trump tweeted his support for Bible study.
Several states have legislation pending that would make Bible literacy courses part of public school education.