WATCH LIVE: Donald Trump and Theresa May answer questions from reporters in joint news conference
Trump ripped up the diplomatic rule book before he even touched down by endorsing former foreign minister Boris Johnson to take over from Theresa May. (AFP / Brendan Smialowski)

President Donald Trump and British Prime Minister Theresa May will hold a joint news conference Tuesday morning during his state visit to the United Kingdom.

The event is scheduled to begin at 8:45 a.m. EST.

The president and outgoing prime minister are expected to be asked about Brexit, Trump's feud with London mayor Sadiq Khan and widespread protests of the U.S. president's visit.