In a series of phone calls over four days, the president and close American allies shared concerns about Russia's new nuclear weapons.
Trump said the U.K.'s National Health Service was "going broke and not working" on Monday.
The president this week insisted he was on good terms with the prime minister.
The president says he "would certainly apologize" if anyone in Britain was offended.
The president also praised May for tackling the "false rumors" that they were not on good terms.
When they speak, British Prime Minister Theresa May is often interrupted by Trump, who launches into monologues, according to a report.
The president is upset about a “bad deal” made in 2008.
Before announcing her engagement to Prince Harry, Meghan Markle called Trump "divisive" and "misogynistic."
German Foreign Minister Sigmar Gabriel is deeply critical of Trump’s stance on Iran and North Korea and says Europe must take its own path.
Britain’s foreign secretary will visit Moscow in the coming months to address the country's relationship with Vladimir Putin.
Article 29 of the Iran nuclear deal states that no country should discourage trade with Iran, something President Donald Trump has done for some time.
Throat problems have a habit of showing up at the most inopportune times—even for world leaders.
Former U.K. ambassador to Saudi Arabia William Patey blasted Saudi Arabia’s “unhealthy” Salafi-Wahhabi Islam, saying it could promote extremism.
Trump is positive he will visit London but there's still no date set.
A parliamentary session usually runs for a year, from spring to spring. But the government will double the length of the session to let lawmakers debate Britain's approach to Brexit without interruption.
Decades of terrorism in Africa show that heavy-handedness is not the solution to a rising militant threat.
Prime minister retains most of her ministers and appoints party rival Michael Gove to agriculture post.
The Conservative Party will form U.K.’s next government with support from the Northern Irish party.
Senior Conservatives told May that if the advisors didn’t go, they would mount a leadership challenge.
No party gained an outright majority so there will need to be a deal before the prime minister is confirmed.