Poland's Foreign Minister Witold Waszczykowski speaks during a news briefing with his Ukrainian counterpart Pavlo Klimkin (not seen) in Kiev, Ukraine, September 13, 2016. REUTERS/Valentyn Ogirenko

WARSAW (Reuters) - The European Commission’s view that rule of law is threatened in Poland is groundless, the foreign ministry said on Thursday, a day after a senior Commission official said there was a serious issue with the independence of Poland’s highest court.