Former prime minister Brian Mulroney has sung When Irish Eyes are Smiling at a cancer charity event at Mar-a-Lago, the private club owned by Donald Trump. Mulroney was urged urged to go onstage by musician David Foster who played the piano for the former prime minister. The offering is seen in out of focus video posted to YouTube. It is said to have inspired favorable comments from the crowd about Canada and the current PM Justin Trudeau. The Saturday evening event recalled a much more rehearsed Mulroney vocalizing of Irish Eyes with then President Reagan in the 80s. On that occasion the warbling diplomacy was seen as evidence of the enduring (and favorable) relationship enjoyed by Canada with the US.