His tweets have the power to shape international relations, send stock prices up — or down — and galvanize the American public.

We're watching how Donald Trump is using this platform of unfettered communication now that he’s commander in chief. Here is everything Trump has tweeted since he was sworn in as 45th president of the United States. In many cases, we look at what he was reacting to and whether what he said was accurate. And, as much as possible, we'll relate what else was going on at the time. Check back for more as Trump continues to tweet.

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Trump continues Twitter broadside against Sen. Bob Corker

President Trump launched a Twitter broadside on Sunday morning against a respected senior Republican senator, who fired back by saying that the White House had become an “adult day care center.”

The stunning exchange-by-tweet captured the disruption that Trump has brought to the Republican Party he now heads, and put his agenda further at risk in a Senate where Republicans have just a two-vote margin of control.

Sen. Bob Corker of Tennessee last week had praised several of Trump's senior advisors for their sober-minded style and declared that they were helping to stave off “chaos,” making clear in follow-up comments that the chaos was the work of the president.

Sunday's tweets suggested the president was still smarting over that implied criticism of him days earlier.

Corker, who is not seeking reelection, responded with a stunning observation about the White House given its resident's penchant for Twitter outbursts outside of normal business hours. In so doing, Corker said publicly what many Republicans in Congress have largely limited to their private conversations.

Trump renewed the back-and-forth Sunday afternoon, shortly after he returned to the White House from his Virginia golf club.

Even for a president who rarely allows any slight to go unanswered, Trump's outburst was an extraordinary show of hostility aimed at a well-respected senator. Corker is chairman of the Senate Foreign Relations Committee. The president has previously tangled with other Republican senators, including Senate Majority Leader Mitch McConnell of Kentucky and John McCain and Jeff Flake of Arizona.

This war of words began when Corker, without mentioning Trump by name, offered a thinly veiled critique last week of Trump's leadership style.

"I think Secretary Tillerson, Secretary Mattis and chief of staff Kelly are those people that help separate our country from chaos," Corker said Wednesday, referring to Secretary of State Rex Tillerson, Defense Secretary James N. Mattis and White House chief of staff John F. Kelly. He was responding to reports of high tensions between Trump and Tillerson.

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