US Senator John Mccain has passed away at the age of 81 and US President Donald Trump has paid tribute to this leader through his twitter account. ' My deepest sympathies and respect go out to the family of John Mccain. Our hearts and prayers are with you" stated Donald Trump in his tribute to Mccain. John Mccain was a war hero for the Americans and he even was disabled during a war and he has served as a Senator for three decades. Watch the video for more details.