But when eight people were mowed down in a terrorist attack by a man shouting "Allahu akbar", President Donald Trump pounced nearly immediately, seizing on the tragedy to push his proposals for tightening immigration controls.
A white Toyota minivan with Florida plates parked in a New Jersey Home Depot lot was surrounded by the police, who are investigating a rented Home Depot truck's deadly rampage down a bike path near New York's World Trade Center.
In a brief Tweet on Tuesday night Mr Trump said: "I have just ordered Homeland Security to step up our already Extreme Vetting Program. And we have to get much less politically correct", he said during a cabinet meeting.
The alleged perpetrator is 29 years old and arrived in America in 2010 from Uzbekistan.
Also, "he didn't answer when reporters pressed him about whether the shooting was an act of 'domestic terrorism.' Trump previously addressed the nation in a somber speech on Monday morning, labeling the shooting 'pure evil'".
During her phone call with the U.S. president, May told Trump that the United Kingdom stands "shoulder to shoulder" in the fight to defeat the evil of terrorism.
In practice, that promise so far has been labeled "enhanced vetting", which has been implemented in regards to the U.S. Refugee Admissions Program.More news: UP: 9 dead, many injured in blast at thermal power plant
A few hours earlier, Trump had referred to the Islamic State terror group in another tweet although the organisation has not yet claimed the New York City attack.
New York Mayor Bill de Blasco responded to Tuesday's attack: "This was an act of terror, and a particularly cowardly act of terror aimed at innocent civilians, aimed at people going about their lives who had no idea what was about to hit them".
Asked to reconcile his responses to the attacks in Orlando and Las Vegas, Sanders suggested Trump had adopted a different tack since assuming the mantle of the presidency. Law enforcement is following this closely.
Shortly after the incident, Trump used Twitter to condemn the attack.
Other experts agreed with this, but said that the Trump administration would put in place "fresher, tighter" mechanisms that everyone has to live with.
The report was released this afternoon: "President Trump's commission on the opioid crisis called Wednesday for a nationwide system of drug courts and easier access to alternatives to opioids for people in pain, part of a wide-ranging menu of improvements it said are needed to curb the opioid epidemic".