U.S. President Donald Trump was met by European Council President Donald Tusk in Brussels on Thursday as he arrived for a meeting with the heads of the European Union institutions.

Trump will later attend a summit of NATO leaders at the military alliance’s headquarters in the city.

The U.S. president, who is on the fourth leg of his first foreign trip since taking office, was greeted by Tusk, a former Polish prime minister who chairs meetings of the 28 EU leaders.

Also joining the talks will be the bloc’s chief executive, European Commission President Jean-Claude Juncker.

Trump, who voiced skepticism while campaigning about the EU’s value and hailed Britain’s Brexit vote to quit the bloc, will hear a call from European leaders for him to maintain Washington’s longstanding support for integration on the continent, as well to support free trade and efforts to combat climate change.