The actor was accused of staying seated during a military salute at Wrigley Field, but he insists he did rise.
The former senator remembered the late president as a "cherished servant leader."
A North Korean propaganda video shows the president saluting a general during this week's summit.
Our country may be divided on many things, but when it comes to our troops, we've made up our mind: national service should be rewarded with national praise. The LGBT community is fortunate to have great war heroes and veterans amongst our ranks.
The crowd was cheering so loudly after Obama was sworn in that it was all but impossible to hear the cannon fire. That summed up the day, for me, more poignantly than anything else.