Despite President Trump’s demands that Russia halt attacks on Ukraine soon, Putin still believes time is on his side.

Ukrainian and Russian officials ended their third round of peace negotiations in under an hour Wednesday — falling short of establishing a cease-fire but agreeing to a prison swap. The talks took place in Istanbul just over a week after President Trump threatened Russian President Vladimir Putin with “very severe tariffs” if he doesn’t commit to a cease-fire in Ukraine within 50 days.

U.S. President Donald Trump on Thursday sharply criticized Russia's "disgusting" behavior against Ukraine and said he plans to impose sanctions on Moscow if no agreement can be reached.