He thanked her for the refugees.
Via NY Post:
President Obama logged his final world-leader phone call Thursday, thanking German Chancellor Angela Merkel and her husband, Joachim Sauer, “for their personal friednship” and partnership, the White House announced.
Michelle Obama joined her husband on the phone call, according to a readout from the White House.
“The President thanked Chancellor Merkel for her strong, courageous, and steady leadership,” the statement added.
Merkel is up for re-election this year, trying to avoid a wave of nationalism that has swayed elections in Europe and the US.