Hillary Clinton trolled two White House opponents with a single response, dinging Gary Johnson and Donald Trump by naming Angela Merkel as her favorite world leader.

The Democratic presidential nominee on Thursday joined the discussion about politicians’ favorite world leaders, a topic that went viral when Johnson, the Libertarian nominee, drew a blank when asked Wednesday to name a world leader he looks up to and respects.

“Oh, let me think. Look, I like a lot of the world leaders,” Clinton said, bursting into laughter initially when asked about her favorite world leader during a gaggle with reporters aboard her campaign plane in Chicago. “One of my favorites is Angela Merkel because I think she’s been an extraordinary, strong leader during difficult times in Europe, which has obvious implications for the rest of the world and, most particularly, our country.”

Clinton praised the German chancellor’s “leadership and steadiness on the Euro crisis,” while adding that “her bravery in the face of the refugee crisis is something that I am impressed by.”