WASHINGTON — Speaking out against weekend mass shootings that rocked a nation, President Donald Trump on Monday called for bipartisan solutions to the bloodshed but offered few details and faced pointed questions from Democrats about whether he had the moral authority to rally a nation against the violence and racism.

Trump, back at the White House after remaining largely out of view for two days at his New Jersey golf club, declared the shootings in Texas and Ohio barbaric crimes “against all humanity” and called for unity to respond to an epidemic of gun violence. He blamed mental illness and video games but did not mention more limits on the firearms that can be sold.

Trump said he wanted legislation providing “strong background checks” for gun users, though he has reneged on previous promises along that line after mass attacks. He seemed to abandon his latest idea of linking gun control legislation to immigration policy just a few hours after proposing it.

“We vow to act with urgent resolve,” Trump said as the death toll from the shootings in El Paso and Dayton reached 31 late Monday. His scripted remarks included a solitary denunciation of white supremacy, which he has been reluctant to criticize, and he made no mention of the anti-immigration rhetoric found in an online screed posted just before the El Paso attack that mirrored his own incendiary language. Detectives seek to determine if it was written by the man arrested.

The mayor of El Paso said at a news conference that Trump would visit the city Wednesday, though some local lawmakers and others opposed that. The Federal Aviation Administration advised pilots of a presidential visit to Dayton.

At the White House, Trump declared, “In one voice, our nation must condemn racism, bigotry and white supremacy.”

He said he had directed the FBI to examine steps to identify and address domestic terrorism. “These sinister ideologies must be defeated. Hate has no place in America,” he said.

He called for law enforcement and social media companies to do more to combat extremism and spot warning signs of violence online. He also asked for a reduction in the “glorification” of violence in American culture, including video games.

Democrats accused Trump of fostering an environment of hate that led to the shootings, and they angrily renewed their calls for his defeat next year. “He’s been racist from day one — before day one when he was questioning whether Barack Obama was born in the United States,” said former Rep. Beto O’Rourke, a 2020 presidential contender who represented El Paso. “He’s trafficked in this stuff from the very beginning, and we are reaping right now what he has sown and what his supporters in Congress have sown. We have to put a stop to it.”

Former President Obama posted a statement in which he called for the nation to “soundly reject language coming out of the mouths of any of our leaders that feeds a climate of fear and hatred or normalizes racist statements.” Obama did not mention the president by name.