(ANSA-AFP) - BRATISLAVA, 15 FEB - US Secretary of State Marco Rubio arrived in Slovakia on Sunday, continuing his European tour with visits to countries led by right-wing allies of President Donald Trump, with the next stop Hungary. The visits come a day after Rubio called on Europeans to defend "Western civilisation" in a speech at the Munich Security Conference, urging them to rally behind the US president's vision of a "renewal" of the world order. During a visit of several hours in Bratislava, Rubio is scheduled to meet Slovakian Prime Minister Robert Fico, a nationalist leader who has positioned himself as an ally to Trump. During a recent visit to Trump's Mar-a-Lago estate in Florida, Fico reportedly expressed concern about the US president's mental state, according to Politico, citing anonymous European diplomats. Both Washington and Bratislava have vehemently denied this. The Slovak leader said after the Mar-a-Lago meeting that he and Trump had had "extremely important" discussions on nuclear energy. The US Secretary of State will then travel to Budapest for meetings on Monday with Hungarian officials, including Prime Minister Viktor Orban. Trump makes no secret of his support for the right-wing Hungarian nationalist leader, whom he describes as a "strong and powerful man," ahead of parliamentary elections scheduled for April 12. Orban faces the toughest challenge to his grip on power since returning to office in 2010, as his Fidesz party trails opposition leader Peter Magyar's TISZA party in the polls before the election. (ANSA-AFP).