Democrats who control the House of Representatives passed gun bills meant to tighten background checks in February, but the legislation stalled in the Republican-led Senate.

Cutting their summer recess short to consider the new measure after back-to-back shootings on the US-Mexico border in El Paso and in Dayton, Ohio, Democrats hope to restart the gun-control debate before Congress returns on Sept 9.

The panel will consider several bills that include a ban on high-capacity ammunition magazines and “red flag” legislation that would encourage states to confiscate firearms from people deemed a danger to themselves or others.

But only one bill, named the Disarm Hate Act, would seek to use hate crime laws to curb gun violence.

The measure, which mirrors laws already on the books in three US states, would prohibit people convicted of certain violent hate crime misdemeanours from possessing a gun.

Currently, federal law bars only those convicted of more serious hate crime felony offenses from having guns.

Seventy-two percent of US voters want Congress to do more to reduce gun violence, while a majority view prejudice against immigrants as a very serious problem, according to a Quinnipiac University poll released on Thursday.

But if approved by the committee and adopted by the full House, the measure could have a hard time in the Senate, where Republican aides say discussions have focused on background checks and red flag legislation.

The powerful National Rifle Association, which opposes most gun restrictions, said it sees no reason for Congress to change criminal law to control guns.

“Under current law, our legal and criminal justice systems have the tools to keep firearms out the hands of all dangerous criminals – whatever the motivation for their crime,” NRA spokeswoman Catherine Mortensen said in a statement.

But even if it became law, the Disarm Hate Act could prove to be little more than symbolic.

Experts estimate there are no more than 1,000 hate crime convictions in any given year and that just a small fraction involve misdemeanours.

And while 45 of the 50 US states have some type of hate crime law on the books, only about 30 have hate crime misdemeanour offenses.

Still, the bill’s advocates argue that extending the prohibition on firearm possession from hate crime felonies to misdemeanours would close an important gap at a time of rising hate crime activity.

Hate crime incidents have climbed 31% since 2014 to their highest level in nearly a decade, according to FBI data that show a 17% jump to 7,175 incidents in 2017.

The number of hate crime groups rose 30% from 2014 to 2018, according to the Southern Poverty Law Centre.

Experts, meanwhile, say a growing number of mass shootings that involve hate bias could suggest an increasingly deadly role for guns in hate crime activity.

“If we start to see more people using guns targeting others because of race, religion, ethnicity, immigration status, it’s going to really change the game for hate crimes,” said Jack McDevitt, a leading expert on hate crimes at Northeastern University’s Institute on Race and Justice.

Advocates say extending the ban to misdemeanours that involve physical force or a credible threat to personal safety could allow police to intervene early against individuals who could go on to carry out deadly attacks.

“We know that an early precursor to many of these mass shootings is some hate crime activity,” said US Representative David Cicilline, who introduced the bill, which has 136 Democratic co-sponsors.

“If you look at communities of colour, religious minorities or the LGBTQ community, hate crimes against each of these groups have increased,” Cicilline told Reuters.

Several Republican members of the House Judiciary Committee were unavailable to comment on gun legislation despite repeated Reuters queries.

They are expected at the meeting where the new legislation will be taken up for consideration, however.

Republicans favour legislation that would create a Mass Violence Prevention Centre within the Justice Department to coordinate law enforcement responses to potential violence.

It would allow for more federal prosecutors to address violent crimes and would try to reduce the flow of firearms to the black market by stiffening penalties for gun thefts from licensed dealers.

“If we’re going to help prevent mass tragedy, we need to keep guns off the black market. We need to help local, state and federal law enforcement better coordinate responses to potential threats of mass violence,” said a Republican committee aide, who requested anonymity.