President Trump signs $1.5 trillion tax bill into law. The bill overhauls the federal tax code and is a victory for Republicans. The bill cuts taxes for corporations and the wealthy while delivering only moderate cuts to most Americans.

The federal government shuts down for three days after Congress cannot reach an agreement to maintain funding for the government.

Prrsident Trump launches a still-running tariff war against China by slapping tariffs of between 30 and 50 per cent on solar panels and washing machines. Tariffs are gradually applied to other US imports from China and to other countries.

President Trump announces that he is pulling the United States out of the deal with Iran to contain its nuclear program.

President Trump meets with North Korean leader, Kim Jong-un, at a summit in Singapore.

President Trumps signs an executive order ending the policy of separating children from their parents. Between April and June, almost 2,000 children were separated from their parents as they crossed the border into the United States. After public opinion widely condemned the separations, the Trump administration ended the policy.

President Trump and President Vladimir Putin of Russia meet in Helsinki, Finland, for a summit. During the press conference, Trump refuses to speak out against Russian involvement in the 2016 US elections, and he receives criticism from Democrats and Republicans for not standing up to Russia.