BRUSSELS, July 3, 2020 (Xinhua) -- European Commission President Ursula von der Leyen (L) and German Chancellor Angela Merkel (on the screen) attend a video press conference at the European Commission headquarters in Brussels, Belgium, July 2, 2020. The three presidents of the leading European Union (EU) institutions will meet German Chancellor Angela Merkel next week to discuss the thorny issue of the blocs proposal to revive its economy by raising debt, the European Commission said on Thursday.