Millionaire JML founder spoke to IBTimes UK in the wake of Trump's shock White House election.
The travel warning mentions the large-scale protests and the surge in racist attacks as risks.
New presidential aides bring little experience of running government to the White House.
Donald Trump said social media is a 'modern form of communication' that played a key role in his historic victory.
Johnson had described the European reaction to Trump's victory as a 'whinge-o-rama'.
Marine Le Pen will battle for the French presidency in 2017.
The comedian urged progressives not to give up following Donald Trump's election victory.
The Ukip leader also hit out at 'nasty' comments about the President-elect during the campaign.
The interim UKIP leader has become the first British politician to meet the US president-elect.
The anti-immigration politician reportedly accepted an invitation for cooperation from Steve Bannon.
The Democrat said the re-launch of the email probe was a turning point in the polls.
The president-elect had not spoken about his plan to investigate the Democrat since the election.
The Vermont senator said there was a need for new ideas and reforms following election defeat.
Several of the president-elect's children have also taken roles within the team.
The statement goes against his campaign pledge to scrap the Affordable Care Act.
The pair have previously exchanged words on social media sites.
LGBTQ people in particular are worried about the impact of the Republican's win.
The votes are likely to increase Hillary Clinton's existing majority in the state.
Students carrying Trump poster shouted 'white power' as 2016 election-linked incidents surge.
Notes with supportive messages have been plastered across the walls of various subway stations.
Protest turns to riot in Portland as opposition to president-elect continues for third day after election win.
The hackers targeted US-based universities, think tanks, NGOs and the government.