Ukraine's Poroshenko says tougher to secure Western support against Russia

Ukrainian President Petro Poroshenko addresses lawmakers opening a new session of Ukrainian parliament in Kiev, Ukraine, September 6, 2016. REUTERS/Gleb Garanich

KIEV (Reuters) - It has become increasingly difficult for Ukraine to secure Western support in its fight against "Russian aggression" and a full-scale invasion from Russia cannot be ruled out, Ukraine's President Petro Poroshenko said on Tuesday.

Poroshenko said Europe's internal strength was being tested by external issues such as the migration crisis and militant attacks, and warned elections in 2017 could see political forces more willing to compromise with the Kremlin take power.