President Barack Obama called President Bronislaw Komorowski of Poland on Monday to congratulate him on his election to a five-year term following the plane crash that killed the late President Lech Kaczynski and other senior members of the Polish government.

Komorowski, the acting president, defeated Kaczynski’s twin brother, Jaroslaw, with 53 percent of the vote in the Sunday election.

The White House said in a statement that Obama invited Komorowski to Washington and praised the Polish people for their “resilience and resolve” following Kaczynski’s death in April. 

Also Monday, Obama participated in a conference call with Gen. David Petraeus, the new commander of U.S. forces in Afghanistan, and Karl Eikenberry, the U.S. ambassador to Afghanistan. Petraeus was confirmed to his post last week following the forced resignation of Gen. Stanley McCrystal. His working relationship with Eikenberry is seen as critical to the success of the U.S. war strategy.

The president had no public events Monday, spending a quiet holiday at the White House after celebrating Independence Day on Sunday.