Trump administration stumbles have tested it in first year. Here are some of the key things that have tripped it up:
DEPARTURE OF MICHAEL FLYNN: US President Donald Trump's original pick for national security adviser resigned in February after a few weeks on the job. Flynn, a retired Army general, gave misleading accounts of potentially illegal calls he had with Russian officials before the administration took office. He reportedly discussed lifting sanctions on Moscow put in place as punishment for alleged Russian interference in the 2016 US presidential election.
COMEY FIRED: Trump fired FBI director James Comey in May, raising questions about whether the president had pressured Comey on the Russia investigation. Trump denied having asked Comey to end the investigation. Special counsel Robert Mueller is overseeing the probe.
SUSPICIOUS MEETINGS: The president's son, Donald Trump Jr; his son-in-law Jared Kushner; and then campaign manager Paul Manafort had contacts with Russians during the campaign - including with Russian lawyer Natalia Veselnitskaya who allegedly had damaging information about Hillary Clinton, Trump's opponent.
INDICTMENTS: Manafort and a business associate were the first to be charged in the Russia investigation, for conspiracy, money laundering and violations of lobbying laws. The charges are not directly tied to the campaign. Trump dismissed them as stemming from Manafort's work years before and as showing "no collusion" between his campaign and Russia.
GUILTY PLEA: George Papadopoulos, a former foreign policy adviser for Trump's campaign, pleaded guilty to lying to the FBI about his contacts with Russians. He met with a professor with ties to the Russian government about information that was supposedly damaging to Clinton.
SACKINGS, DEPARTURES AND WHITE HOUSE INTRIGUE: By July, numerous high-profile officials had left their White House jobs - spokesman Sean Spicer; communications director Anthony Scaramucci, who lasted 10 days; chief of staff Reince Priebus; chief strategist Stephen Bannon.
TWITTER: The president's affection for Twitter has created waves at home and abroad. Earlier this month, he began his day by apparently dissing the Foreign Intelligence Surveillance Act, which was due to be reauthorized that day in Congress. He's also used the platform to pick fights with foreign leaders including those from traditional US allies such as Britain, while complicating relations with North Korea by taunting Kim Jong Un.
"FIRE AND FURY": Michael Wolff's explosive book published in January portrays Trump as uninformed and unfit for office. It describes Trump's 2016 campaign as a publicity stunt not intended to win the presidency. Trump has denied the portrayals in the book.
OFFENSIVE WORDS: Trump provoked global outrage in January by reportedly using the words "shithole countries" in a discussion about immigrants from El Salvador, Haiti and African nations. He has denied making the slur.
