Rafal Trzaskowski, the Warsaw mayor, appeared to have won the first round of the election. Prime Minister Donald Tusk is hoping his eventual victory will help push through a liberal agenda.
The 24-year-old took the title at the Eurovision competition with the song Wasted Love.
The two adversaries have spent the week since the end of the military confrontation making the case that they emerged victorious.
Authorities are examining the site in New York to determine how the collision, which killed two, occurred.
The Israeli military attacks numerous targets including a hospital in northern Gaza, as ceasefire negotiations hit hurdles in Qatar.
The barrage comes ahead of a planned call between Presidents Trump and Putin on Monday, as the US pushes for a ceasefire.
The bombardment, which Ukrainian officials said mostly targeted Kyiv, came just before President Trump was expected to talk with President Vladimir V. Putin of Russia.
Karua was allowed into Tanzania last month but has been stopped this time ahead of Tundu Lissu's trial.
This new stage of the war is aimed at pressuring Hamas into releasing hostages and ultimately destroying the group or forcing it to surrender.
This new stage of the war is aimed at pressuring Hamas into releasing hostages and ultimately destroying the group or forcing it to surrender.