The presidents of Ukraine and Russia "have not been exactly best friends," U.S. President Donald Trump said earlier this week, as he pushed for an in-person meeting.

Russian President Vladimir Putin suggests meeting with Ukrainian President Volodymyr Zelenskyy in Moscow while attending military parade with leaders from China and North Korea.

President Donald Trump is seeking to broker peace between the two warring countries but has conceded that Putin may not be willing to make a deal.

Ukrainian President Volodymyr Zelenskyy on Friday declined Russian President Vladimir Putin's suggestion he come to Moscow to negotiate a diplomatic settlement, addressing the proposal for the first time in an interview with ABC News Chief Global Affairs Correspondent Martha Raddatz for "This Week."

President Donald Trump may meet with Ukrainian President Volodymyr Zelenskyy at U..N summit as NATO faces pressure to enforce no-fly zone over Ukraine.