Canadians were shocked by Donald Trump's outburst about Justin Trudeau. Canada and the United States have been allies for more than a century, but there have been disputes between presidents and PMs.
Many presidents have radically changed US foreign policy. Truman created his own doctrine. Carter gave up the Panama Canal. But a presidential historian sees danger in Trump's decision-making style.
President Trump is having trouble finding a lawyer. But other presidents, including Abraham Lincoln, have obtained outside legal counsel easily, even from attorneys who disagree with their politics.
Bill Clinton and Donald Trump share an awkward anniversary.
Trump's promises to Native America have not always been the norm for US presidents. But Richard Nixon had a better record than most.
If Trump is lying to his own lawyers about Russia, he is risking Bill Clinton's fate.
Presidents past have used this nearly limitless power to halt criminal prosecutions before. What's to stop Trump?
Laws that limit presidential power won't enforce themselves – Congress must act.
Research shows that context matters for understanding what a person's words mean – especially when power dynamics are involved.
Did the attorney general help create a false story on why Comey was fired? Sessions' testimony to Congress provides no answers.
We asked an expert on diplomacy and foreign policy.
Reagan, Clinton, Obama and Trump would all pull from the Kennedy playbook, from mastering the media to exuding masculine vitality.
How will Mueller perform as special counsel? A historian compares his actions with another former FBI director to find out.
A professor who once held top secret clearance explains how levels of classification work and where handling sensitive information gets tricky.
The most hated president in US history could teach our new leader a few things.
An analysis of four failed presidential cabinet nominees reveals what obstacles Trump's nominees might face during the confirmation process.
In 1981, many criticized Ronald Reagan's nominee to head human rights initiatives in the State Department. Here is how activists mobilized to ensure the nomination was rejected.
Donald Trump may lose his bid for the White House. But far more competent, grassroots politicians will line up to take his mantle.
The painful effects of globalization and political corruption have decayed Americans' trust in the federal government.
The US presidential debates have been largely silent on climate, but it wasn't always the case.