Manchin said in a statement released Tuesday afternoon that he and the president pledged to "work together to keep our precious children safe."

“I believe that we must have a dialogue and bring parties from all sides to the table," Manchin continued. "I know my friends at the NRA and those who support our Second Amendment rights will participate because I know that their hearts are aching for the families in Newtown, just like all Americans."

 The West Virginia lawmaker characterized the discussion with the president as "productive" and said the nation needed to look at not only gun controls, but a mental health system and "a media and entertainment culture that glorifies unspeakable violence."

On Monday, Manchin told CNN the shooting had "changed me" and said he would support "the dialogue that would bring a total change — and I mean a total change" on gun violence.

Tuesday afternoon, Manchin was seen conferring with Sen. Dianne FeinsteinDianne FeinsteinOvernight Cybersecurity: Kushner says no collusion, improper contacts with Russia | House poised to vote on Russia sanctions | U.S., Japan to beef up cyber cooperation Feinstein calls for Sessions to appear in front of Senate Judiciary Committee This week: ObamaCare repeal vote looms over Senate MORE (D-Calif.), who is planning to reintroduce the assault weapons ban at the opening of the next Congress. Earlier in the afternoon, Carney had signaled that the White House would "actively support" Feinstein's legislation, along with other legislation that would examine the capacity of ammunition clips or a loophole that allowed a gun buyer to avoid a background check by purchasing a weapon at a gun show.

"It is clear that we cannot once again retreat to our separate corners and to our stale talking points, because that inevitably leads to an impasse," Carney said.