But White House press secretary Sarah Huckabee Sanders revealed the President has spoken to a Democrat and a Republican about a bipartisan bill that would force states and federal agencies to report more frequently on offences that prohibit a person from buying a weapon. Richard Blumenthal (D-Conn.). Theoretically, he could push members of his party to change course, but the encouraging signals from the White House in recent days were far outweighed by Trump's appalling remarks about the shooting.
The cyclical aftermath of the nation's mass shooting has repeated itself several times during Trump's year-old presidency, including with the deadliest mass shooting in modern US history when 52 people were killed on the Las Vegas strip last October, and when 26 people were killed at a church service in Sutherland Springs, Texas, in November.
A weekend protest calling for increased gun control in the wake of the Parkland School shooting.
Following the shooting in Sutherland Springs a year ago, the president said, "We have a lot of mental health problems in our country, as do other countries, but this isn't a guns situation".
The White House statement comes as shooting survivors and other young people press for more gun control in a rising chorus of grief and activism.
Nikolas Cruz, the 19-year-old police say has confessed to gunning down 14 students and three adults at the Parkland, Florida, high school school he was expelled from last year, was able to buy an assault-style AR-15 rifle to carry out the mayhem after clearing a background check.
Previous mass shootings during Trump's term - from the Las Vegas Strip to a church in South Texas, both within the past five months - have not led to legislative action, in part because Republicans who run Congress say they would be ineffective and in some cases would infringe on Second Amendment gun rights. In an interview on CNN, she said, "If they accept this blood money, they are against the children ... you're either funding the killers, or you're standing with the children".
Mr Trump also spent time ranting on Twitter.
The senators' bill is narrow in focus, reinforcing the requirement that federal agencies report all criminal infractions to the National Instant Criminal Background Check System (NICS) and creating financial incentives for states to do so, as well.
"Interesting morning. Two quick thoughts: 1/ Trump's support for the FixNICS Act, my bill with @JohnCornyn, is another sign the politics of gun violence are shifting rapidly".
Trump, who said at a 2016 debate that he no longer supported an assault-weapons ban, made gun rights a centerpiece of his campaign.
Trump, who has cited claims about the suspect's mental health problems and criticized the Federal Bureau of Investigation for failing to follow up on a tip about the shooter, has been reluctant to back gun control after past school shootings. The next day, Trump meets with "state and local officials on school safety", according to the White House schedule.
"I have no issue with more extensive background checks", Lankford said. James Lankford, R-Okla., said there may be measures that could be put in place to make it harder to get a gun for someone with the behavioral warning signs people saw in Cruz.