MUNICH: US Secretary of State Marco Rubio is set to begin a two-day trip on Sunday, to bolster ties with Slovakia and Hungary, whose conservative leaders, often at odds with other European Union countries, have warm ties with President Donald Trump. Rubio will use the trip to discuss energy cooperation and bilateral issues, including NATO commitments, the State Department said in an announcement last week.

These countries are "very cooperative" with the US, the official says

At the same gathering of top security officials last year, Vice President JD Vance had attacked European allies, triggering a series of confrontations.