Jan 23: US withdraws from Trans-Pacific Partnership Agreement (TPPA) trade deal.
Jan 25: Executive order urges "immediate construction of a physical wall on the southern border," along with other security measures such as creating more detention centres to house those who enter the country illegally.
A further order targets state and local governments that refuse to enforce federal immigration law. Trump tweets that he will launch an investigation into what he alleges was voter fraud in the November election, including voting by supposed non-citizens, claims for which he offers no evidence.
Jan 26: Trump repeats campaign demand for Mexico to "pay for the badly needed wall," before Mexican President Enrique Pena Nieto cancels a planned Jan 31 White House visit. The White House says that a border tax on goods from Mexico could "easily pay for the wall."
Jan 27: Trump signs executive order suspending US refugee programme for 120 days, indefinitely blocking Syrian refugees, and banning travellers from Iraq, Syria, Iran, Libya, Somalia, Sudan and Yemen for 90 days. He insists the measure is "not a Muslim ban," but a federal judge blocks the order within days.
Trump holds first White House meeting with a foreign leader, British Prime Minister Theresa May. Executive order urges "new planes, new ships, new resources" to rebuild what Trump says is a depleted US military. He reiterates belief that torture is effective but won't override opposition to harsh interrogation methods by his new defence secretary, respected retired general James Mattis.
Jan 28: White House chief strategist Stephen Bannon, an inflammatory right-wing former publisher, is named a member of Trump''s most senior national security group, only to be removed from the panel on April 5.
Jan 29: US raid against an al-Qaeda base in central Yemen leaves some 30 militants and civilians dead, along with one Navy commando.
Feb 2: Trump says he will prioritise renegotiation of the North American Free Trade Agreement in talks with Mexico and Canada.
Feb 10: Trump hosts Japanese Prime Minister Shinzo Abe at the White House, before the leaders and their wives fly to Mar-a-Lago, the president's personal resort in Florida. The White House issues a photo of Trump and Abe high-fiving during a weekend golf game.
Feb 13: National security adviser Michael Flynn is forced to resign just 25 days into Trump's presidency, after admitting to misleading statements about contacts with the Russian ambassador in Washington.
Feb 14: Israeli Prime Minister Benjamin Netanyahu visits the White House, with Trump saying he "can live with" either a one-state or two-state solution to the Israeli-Palestinian conflict.
Feb 16: Trump holds a 77-minute press conference in the East Room, with long, unstructured exchanges with White House reporters. He names a new pick to head the Labour Department, a day after his first choice dropped out, while insisting that his administration is a "fine-tuned machine."
Trump denies any dealings in Russia, complains about having "inherited a mess" from previous president Barack Obama, and lashes out at the media while joking about coining the label "fake news".
Feb 27: A White House outline of Trump's budget plans calls for higher defence and cuts to foreign aide and most domestic programmes.
Feb 28: In his first speech to a joint session of Congress, Trump sounds a a rare conciliatory tone, focusing on job creation, national security, immigration reform and repealing the Obamacare health insurance reforms.
March 4: Trump uses Twitter to issue unfounded allegations that predecessor Barack Obama wiretapped Trump Tower during the 2016 presidential campaign. Obama rejects the accusations.
March 6: A revised order halts all refugee approvals for 120 days and blocks new visas for 90 days for people from Syria, Iran, Libya, Somalia, Sudan and Yemen. Iraq is dropped from the banned list, Syrian refugees are no longer singled out for an indefinite ban. A judge blocks the new order before the scheduled March 16 implementation.
March 17: After frequently criticising her welcoming policies toward refugees, Trump hosts German Chancellor Angela Merkel at the White House. A day later, Trump tweets about a "GREAT meeting" while accusing Germany of owing "vast sums of money to Nato" and demanding that the United States "must be paid more for the powerful and very expensive defence it provides to Germany!"
March 22: State Department hosts 68-country coalition against the Islamic State movement, urging participants to increase their military and financial contributions to the effort.
March 24: Trump's campaign vow to undo Obamacare unravels, with Republican leaders in the House of Representatives cancelling a vote on their own proposal amid opposition within the conservative party from both moderates and hardliners unhappy with the replacement measure. State Department issues permit authorising construction of Keystone XL Pipeline from Canada.
March 29: Daughter Ivanka Trump says that she will become an official White House employee, plans for her to serve as an unofficial adviser prompted ethics concerns.
April 6: Trump orders missile strikes against a Syrian airbase in response to chemical weapons, which he accuses the Damascus regime of using against its own civilians.The strikes are carried out while he is hosting Chinese President Xi Jinping at Mar-a-Lago, and Trump informs his visitor of the US action in Syria over chocolate cake.
April 7: Trump's Supreme Court nominee, federal judge Neil Gorsuch, is confirmed by the Senate 54-45, after the upper chamber changes its rules to deny the Democratic minority the ability to block the vote.
April 12: The Nato alliance is "no longer obsolete," Trump says, after White House talks with North Atlantic Treaty Organisation (Nato) secretary-general Jens Stoltenberg.
April 16: Trump tweets that he will not declare China a currency manipulator - as vowed during his campaign - because Beijing is "working with us on the North Korean problem".
- dpa
