President Trump is set to arrive in New York City Sunday night ahead the United Nations General Assembly, where he will spend the next three days with meeting world leaders amid escalating tensions with Iran and a whistleblower flap with Ukraine.

On Monday, Trump will not join other leaders at the UN Climate Summit, instead focusing on his “core event” — a forum in a UN conference room to make a global call to protect religious freedom.

“He will use this opportunity to showcase the administration’s commitment to upholding democracy and protecting religious freedoms,” a senior administration official said of Trump’s “key” focus on Monday.

After that, he will hold a series of bilateral meetings with world leaders, including Prime Minister Imran Khan of Pakistan, President Andrzej Duda of Poland, Prime Minister Jacinda Ardern of New Zealand, Prime Minister Lee Hsien Loong of Singapore, President Abdel Fattah el-Sisi of Egypt and President Moon Jae-in of South Korea.

On Tuesday morning, Trump will deliver his UN speech before the General Assembly — his first major foreign address since the departure of hawkish National Security Adviser John Bolton.

Themes of Trump’s message will include upholding the sovereignty and independence of UN countries, protecting religious freedoms and “underscore[ing] that America is a positive alternative to authoritarianism,” according to a senior administration official.

After his speech Tuesday, Trump will meet Prime Minister Boris Johnson of the United Kingdom, Prime Minister Narendra Modi of India, and President Barham Salih of Iraq.

The spotlight will be on Trump’s Wednesday bilateral meeting with Ukrainian President Volodymyr Zelensky amid reports that Trump previously pressured Zelensky to look into former Vice President Joe Biden’s son’s business dealings there.

A whistleblower reportedly flagged the conversation to the inspector general of the intelligence community last month, but Trump defended his discussions with Zelensky earlier Sunday as “perfect.”

Trump will also meet Wednesday with Western Hemisphere leaders about Venezuela, as well as Prime Minister Shinzō Abe of Japan and President of El Salvador Nayib Bukele.

Trump will conclude his UN trip with a press conference Wednesday and will return to Washington the next day.

Trump’s previous addresses to the UN gathering have garnered mixed headlines — in 2017, he gave a fiery speech in which he nicknamed North Korean dictator Kim Jong Un as “Little Rocket Man” and last year declared his administration has “accomplished more than almost any administration in the history of our country” to a mix of applause and laughter.

“I think for President Trump at the UN, the hope is the third is time is charm,” said Jon Alterman, director of the Middle East program at the Center for Strategic and International Studies. “Now we have a General Assembly meeting where the president really needs allies on Iran.”

Trump has said he has no plans to meet with Iranian President Hassan Rouhani this week. His administration blames Iran for recent attacks on major oil facilities in Saudi Arabia — although Iran has denied involvement.

On Friday, Trump slapped Iran with a fresh round of sanctions against its national bank and declared that its economy is “going to hell,” while authorizing the deployment of troops to Saudi Arabia to strengthen air and missile defenses.