Watch CNBC’s full interview with the EU's top diplomat Kaja Kallas

European Union High Representative for Foreign Affairs and Security Policy and Vice-President of the European Commission Kaja Kallas, joins “Squawk Box Europe” to discuss the upcoming meeting between U.S. President Donald Trump and his Russian counterpart Vladimir Putin. Kallas accuses Putin of “pretending” to negotiate and says Ukraine needs to be at the table because no agreement can be made behind its back.