Democrat Beto O'Rourke lost in Texas, but many expect to see him return in the 2020 presidential race.
The Democrats are currently about 57% to 43% favourites over the Republicans to win the presidency – if you trust the markets.
Much is hanging on the outcome of the US mid-term elections - and much of it is unpredictable.
Wes Mountain/The Conversation
The Democrats are favoured to win control of the US House, but it may be closer than expected.
With the Democrats favoured to win back the House of Representatives in the midterm elections, that makes impeachment of Trump more likely, right?
If the Democrats get close to retaking the House of Representatives in the midterm elections, the odds of impeachment are high. But the Senate remains problematic.
U.S. President Donald Trump during a campaign rally in Topeka, Kan., Oct. 6, 2018.
US law says the president can't be indicted, an echo of ancient Roman law. The efforts Roman leader Julius Caesar made to maintain his immunity is a cautionary tale for America's political system.
And if President Trump is removed from office? Meet President Pence.
The claim of "resistance" inside the White House offers the possibility of government by Trump appointees who prefer to keep their positions rather than publicly denounce a man they disapprove of.
The U.S. Capitol is seen here in this January 2018 photo. Three top Russian intelligence officials met with their American counterparts in D.C. in January. Why?
In January, three top Russian intelligence officials met with their peers in Washington, D.C. What was their goal amid the Robert Mueller investigation? An expert on Russia speculates.
Trump meets with his ‘board.’
The allegations raised in a book on the Trump administration by Bob Woodward and an anonymous op-ed would be enough to get most CEOs fired.
What are the ethics of anonymous resistance?
An expert argues why the anonymous op-ed in The New York Times can hardly be considered an act of civil disobedience and why it might make things even worse in the Trump administration.
Rob Rosenstein suggested invoking the 25th Amendment to remove Trump from power in Spring 2017, according to the New York Times.
The US Constitution allows the president to be removed from power if his vice president and Cabinet decide that he cannot discharge the duties of his office.
After the Manafort and Cohen news dropped, many wondered how Trump would respond. By the following morning, a messaging strategy seemed to coalesce.
Nick Lehr/The Conversation via Reuters and AP Photo
Trump's surrogates have deployed tried and true rhetorical techniques to defend the president.
Trump’s long-time lawyer and political ‘fixer’ has pleaded guilty to breaking two campaign finance laws, allegedly at the direction of the president.
Trump's former personal lawyer broke two laws that control political spending, both passed after major election scandals. President Roosevelt survived his campaign's misdeeds. Nixon did not.
Atty. Gen. Elliot Richardson swears in William D. Ruckelshaus as his deputy. Both men later resigned rather than carry out Nixon’s order to fire the Watergate special prosecutor.
Republicans in Congress today are different than GOP figures who challenged President Nixon during Watergate. GOP leaders now stand in contrast to those who once chose country over loyalty to one man.
Trouble: Michael Cohen leaves the US Federal Court in New York.
Whereas Richard Nixon was laid low by Watergate, Bill Clinton's approval ratings went up during the Lewinsky scandal. How will Trump fare?
Did Maine Gov. Paul LePage stay at a Trump hotel to ingratiate himself with the president?
AP Photo/Robert F. Bukaty
The court carefully considered what the word 'emoluments' meant at the time the Constitution was drafted.
Michelle Mielly, Grenoble Ecole de Management.
Third in the Oxford-style debate series, this article argues against the motion that “the impact reflected by Trump is here to stay” by focusing on the transitory nature of his presidency.
Donald Trump, taking the presidential oath of office in 2017.
Donald Trump has lately been called "treasonous" by some; others say he's violated his oath of office. What are the president's Constitutional obligations -- and who holds the president accountable?
Trump with the men who would replace him – Vice President Mike Pence on the left and House Speaker Paul Ryan on the left.
Win McNamee/AP Pool
The president won't be removed from office until Republicans in the House decide to support the idea – or the midterms hand the Democrats more seats.
U.S. President Donald Trump speaks with Russian President Vladimir Putin during a news conference after their meeting at the Presidential Palace in Helsinki, Finland on July 16, 2018.
(AP Photo/Pablo Martinez Monsivais)
In the hands of a legitimate president, the recent indictments against Russian nationals for interfering in the 2016 presidential election would have been a powerful tool at a summit. Not Donald Trump.
A date with destiny: Donald Trump and Anthony Kennedy.
EPA/Jim Lo Scalzo
In 1987, Anthony Kennedy was nominated to end a titanic Supreme Court fight. Could his putative successor trigger another one?
Is Donald Trump a pawn of Russia? A mini-blimp floating during anti-Trump protests in London depicts the president as a giant baby – just as he prepares to meet with Vladimir Putin.
(AP Photo/Matt Dunham)
As Donald Trump prepares to meet with Vladimir Putin in Helsinki, here's a detailed explanation of how one goes about subverting democracy via a stooge.