The White House said Trump canceled a trip to Latin America, which had been set to begin Friday, so that he could "oversee the American response to Syria".
Asked about possible USA strikes on Syria, President Vladimir Putin's spokesman Dmitry Peskov said Thursday that "it's necessary to avoid any steps that may fuel tensions in Syria".
White House spokeswoman Sarah Sanders said Wednesday that the President has "very deep concern about the direction that the special counsel and other investigations have taken".
"The first thing we have to look at is why are chemical weapons still being used at all when Russian Federation was the framework guarantor of removing all the chemical weapons", Mattis said.
Trump appeared to soften his rhetoric in a follow-up tweet Wednesday morning, saying there is "no reason" for the US's worsening relationship with Russian Federation and that "we need all nations to work together". Trump, then, isn't really tipping his hand on Syria.
The Pentagon refused to comment further on potential future military operations in response to Trump's tweet.
At the House hearing, Democrats grilled Mattis on the wisdom and legality of Trump ordering an attack on Syria without explicit authorization from Congress. Mattis argued it would be justified as an act of self-defense, with 2,000 US ground troops in Syria; he insisted he could not talk about military plans because an attack "is not yet in the offing".
Mattis was to meet with Trump later Wednesday.
In his tweet on Wednesday, Trump referred to Assad as a "gas killing animal".
It's deadline day to file your taxes
Any taxes due that haven't been paid by Tuesday at 11:59 p.m., will be assessed a penalty of 0.5 percent per month. But bear in mind - even if the IRS grants you more time, you still need to pay the taxes you owe by April 17.
The nighttime Syria assault was carefully limited to minimize civilian casualties and avoid direct conflict with Syria's key ally, Russia, but confusion arose over the extent to which Washington warned Moscow in advance. American missiles are probably not the accountability mechanism Guterres had in mind.
US intervention in Syria would exacerbate deteriorating relations with Russian Federation, as Trump acknowledged Wednesday.
"Don't discount the possibility of Tomahawk-capable submarines in the region", Kirby said.
He said the strikes were unlikely to curb the government's ability to produce or launch new attacks. Russian officials had said USA and Russian military staffs remained in contact regarding Syria, even as Russian media carried stories in recent days about the potential outbreak of "World War III" as a outcome of a US airstrike against Assad. Since then, Russian Federation has used Syria as a testing ground for some of its most sophisticated weaponry.
Trump said the strikes were in coordination with France and the United Kingdom, adding that the goal of the campaign is to "establish a strong deterrent against the production, spread and use of chemical weapons".
French Foreign Minister Jean-Yves Le Drian also spoke with reporters Saturday morning, saying that the operation was created to target the Assad regime for its use of chemical weapons, and not Syrian civilians or Syrian allies.
May will host a Cabinet meeting on Thursday "to discuss the response to Syria", a Downing Street spokesperson confirmed to CNN.
"This attack that took place in Douma is a barbaric attack".
Russian Federation responded by saying USA missiles should target "terrorists", not the "legitimate government" in Syria.
France has 10 Rafale fighter jets stationed in Jordan and the United Arab Emirates which could be armed with "storm shadow" missiles that can fly for more than 155 miles, according to the French Ministry of Defense and retired general Dominique Trinquand. Russia, entrenched in Syria in support of President Bashar Assad, is threatening to strike back.