The U.S. Conference of Mayors (USCM) was among the first national groups to announce support for President Obama's coming executive action on gun control.

"The nation's mayors applaud the important step President Obama is taking to reduce gun violence in our nation," said Baltimore Mayor and USCM President Stephanie Rawlings in a statement Monday. "Every day in America, 89 people die from gun violence; 31 of these are murdered. This is unacceptable, it is intolerable, and it is why the vast majority of Americans support strengthening the background-check system."

The nonpartisan organization — comprised of 1,400 mayors from cities with populations greater than 30,000 — endorsed the Obama administration's plans to enhance background and mental health checks on gun buyers.

"Can there be any doubt that background checks for all handgun sales can make a difference? In the 18 states that require them, 46 percent fewer women are shot to death by their intimate partners, 48 percent fewer on-duty law enforcement officers are killed with handguns that are not their own, and the rate of gun trafficking is 48 percent lower," said Rawlings.

President Obama is scheduled to make a full announcement Wednesday morning about his actions to reduce gun violence.

The move comes one month after a mass shooting by Muslim terrorists in San Bernardino, Calif., which left 14 people dead and 22 others injured.