View of a clip of President Reagan's famous 1987 Berlin Wall speech in which he asks Soviet leader Mikhail Gorbachev to "tear down this wall." Video courtesy of Reagan Presidential Library.

The American president wears many hats: head of state, head of government, commander in chief, top diplomat, party leader, No. 1 citizen and leader of the free world. Donald Trump ...

In 1987, U.S. President Ronald Reagan stood before the Berlin Wall and declared, “Mr. Gorbachev, tear down this wall.” Canada now needs a prime minister to channel that energy and demand ...