Lawmakers are offering a range of measures to respond to the Florida high school shooting last month that left 17 people dead.

Despite the flurry sparked by President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE’s call for new legislation, there’s no sign of a bill that can pass both chambers.

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But that hasn’t stopped members from outlining a number of options.

Here's a look at the competing proposals.

Fix NICS Act

This bill is aimed at bolstering records in the National Instant Criminal Background Check System (NICS) and was introduced after a shooting last year in Sutherland Springs, Texas.

It has gained new momentum, but also new opposition, since the shooting in Parkland, Fla.

The bill enforces existing laws by ensuring that authorities report criminal records to the system and penalizing agencies that don't.

Despite its bipartisan origins — it was introduced by Sens. John Cornyn John CornynCalls grow for Biden to expand election map in final sprint Bipartisan praise pours in after Ginsburg's death Chamber of Commerce endorses McSally for reelection MORE (R-Texas) and Chris Murphy Christopher (Chris) Scott MurphyDemocratic senator calls for 'more flexible' medical supply chain to counter pandemics The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon GOP chairman to release interim report on Biden probe 'in about a week' MORE (D-Conn.) — Democrats have rejected the bill as too narrow.

Manchin-Toomey

The 2013 background check bill got a burst of new life after President Trump suggested it be used as the base for Congress’s new gun push.

The legislation spearheaded by Sens. Joe Manchin Joseph (Joe) ManchinNames to watch as Trump picks Ginsburg replacement on Supreme Court Momentum growing among Republicans for Supreme Court vote before Election Day Gardner on court vacancy: Country needs to mourn Ginsburg 'before the politics begin' MORE (D-W.Va.) and Pat Toomey Patrick (Pat) Joseph ToomeyAppeals court rules NSA's bulk phone data collection illegal Dunford withdraws from consideration to chair coronavirus oversight panel GOP senators push for quick, partial reopening of economy MORE (R-Pa.) in the weeks after the Sandy Hook Elementary School shooting failed to overcome a filibuster, mostly by Republicans.

Five Democrats also opposed it, but only one, Sen. Heidi Heitkamp Mary (Heidi) Kathryn HeitkampCentrists, progressives rally around Harris pick for VP 70 former senators propose bipartisan caucus for incumbents Susan Collins set to play pivotal role in impeachment drama MORE (D-N.D.), remains in the Senate. She is up for reelection this fall.

The legislation would have expanded background checks for internet and gun show sales, while also including exemptions for friends and family.

Toomey told The Associated Press that he spoke on the phone with Trump, who was supportive of using Manchin-Toomey as the “core legislative vehicle.”

But the bill would likely face an uphill battle.

Twelve Democrats who supported the legislation are no longer in the Senate and half of them were replaced by Republicans.

Background checks:

Senate Democrats are demanding more extensive background checks on gun purchases.

Sen. Charles Schumer Chuck SchumerRepublican senator says plans to confirm justice before election 'completely consistent with the precedent' Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral Graham signals support for confirming a Supreme Court nominee this year MORE (D-N.Y.), outlining his caucus’s three-part plan, said Trump should “at a minimum” support closing “loopholes” by requiring background checks for all firearms sold at gun shows or over the internet.

“I think the president knows he could show real leadership by bucking the [National Rifle Association], providing cover for his Republicans and getting something actually done,” he told reporters.

Schumer didn’t say if Democrats would offer Manchin-Toomey as their background check legislation or file a separate piece of legislation.

A Quinnipiac University poll released late last month found that 97 percent of Americans — including 97 percent of gun owners and 97 percent of Republicans — support requiring a background check on every gun sale.

White House press secretary Sarah Huckabee Sanders said on Friday that the president is “not necessarily” pushing for “universal” background checks.

“Certainly improving the background check system. He wants to see what that legislation, the final piece of it looks like,” she told reporters.

School safety

Trump has homed in on school safety following the shooting, saying campuses should be “hardened.”

“These include allowing people with a certified training, very talented people, to carry firearms,” Trump said during this week’s White House meeting with lawmakers.

While getting Congress to pass funding for his idea appears unlikely, lawmakers are offering, or preparing to offer, their own school safety legislation.

Republican senators, led by Sen. Orrin Hatch Orrin Grant HatchBottom line Bottom line Senate GOP divided over whether they'd fill Supreme Court vacancy MORE (Utah), are expected to introduce legislation that would increase funding for Justice Department school violence prevention grants.

Meanwhile, Sen. Marco Rubio Marco Antonio RubioSunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Florida senators pushing to keep Daylight Savings Time during pandemic Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll MORE (R-Fla.), arguing federal law “appears to discourage school systems from reporting dangerous students to law enforcement,” said he would introduce legislation to try to cut down on the delay.

In the House, Rep. Kay Granger Norvell (Kay) Kay GrangerBottom line Helping our seniors before it's too late House approves .3 trillion spending package for 2021 MORE (R-Texas) is offering legislation that would encourage local school districts to buy and install metal detectors.

And Rep. Roger Williams John (Roger) Roger WilliamsThe Hill's 12:30 Report - Presented by Facebook - Yoho apologizes for accosting AOC Ocasio-Cortez accosted by GOP lawmaker over remarks: 'That kind of confrontation hasn't ever happened to me' Cook shifts 20 House districts toward Democrats MORE (R-Texas) introduced legislation that would allow the Department of Education to create a grant for school districts to be able to conduct independent security assessments.

Assault weapons ban

House and Senate Democrats are pushing for a ban on assault weapons following the Florida shooting — a move supported by the party’s base but unlikely to pass Congress.

Sen. Dianne Feinstein Dianne Emiel FeinsteinNames to watch as Trump picks Ginsburg replacement on Supreme Court McConnell says Trump nominee to replace Ginsburg will get Senate vote Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence MORE (D-Calif.) raised the issue during the White House meeting and was openly giddy when Trump appeared open to including it in a broad bill.

A recent assault weapons ban bill won over 27 Senate Democrats, including Democratic Sens. Kirsten Gillibrand Kirsten GillibrandSunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Suburban moms are going to decide the 2020 election Jon Stewart urges Congress to help veterans exposed to burn pits MORE (N.Y.), Kamala Harris Kamala HarrisSocial Security and Medicare are on the ballot this November Harris honors Ginsburg, visits Supreme Court The Hill's Campaign Report: Trump and Biden vie for Minnesota | Early voting begins in four states | Blue state GOP governors back Susan Collins MORE (Calif.), Cory Booker Cory Anthony BookerBipartisan praise pours in after Ginsburg's death DHS opens probe into allegations at Georgia ICE facility Democratic lawmakers call for an investigation into allegations of medical neglect at Georgia ICE facility MORE (N.J.), as well as Sen. Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE (I-Vt.) — all viewed as potential 2020 contenders.

Most of the House Democratic Caucus is backing similar legislation.

Minimum age

Sens. Jeff Flake Jeffrey (Jeff) Lane FlakeJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Republican former Michigan governor says he's voting for Biden Maybe they just don't like cowboys: The president is successful, some just don't like his style MORE (R-Ariz.) and Feinstein introduced legislation less than an hour after the White House meeting that would raise the minimum age for buying an assault rifle from 18 to 21.

The suspect in the Florida shooting, 19-year-old Nikolas Cruz, is said to have used an AR-15, which gun control proponents say is a form of an assault weapon. Many gun rights supporters disagree with that view.

Trump encouraged lawmakers to strongly consider the issue, though Sanders acknowledged that Trump “knows there's not a lot of broad support for that.”

GOP Rep. Thomas Massie Thomas Harold MassieGOP lawmaker praises Kyle Rittenhouse's 'restraint' for not emptying magazine during shooting Rep. Dan Meuser tests positive for COVID-19 Liz Cheney wins Wyoming GOP primary in reelection bid MORE (Ky.) has introduced a bill that would lower the minimum age for buying a handgun from 21 to 18.

Bump stocks

Lawmakers are pushing forward with formal legislation to ban bump stocks even as Trump said he would “quickly” sign an executive order making the gun attachment illegal.

The device allows a semi-automatic weapon to function similarly to an automatic weapon, with multiple rounds fired with the single pull of a trigger.

Flake and Democratic Sens. Martin Heinrich Martin Trevor HeinrichSenate Democrats demand White House fire controversial head of public lands agency Senate Democrats seek removal of controversial public lands head after nomination withdrawal Five takeaways from final Senate Intel Russia report MORE (N.M.) and Catherine Cortez Masto Catherine Marie Cortez MastoDemocratic Senate campaign arm raised nearly M in August VA problems raise worries about mail slowdown, prescriptions Cortez Masto touts mail-in voting in convention speech MORE (Nev.) introduced the bill. Sen. Chuck Grassley Charles (Chuck) Ernest GrassleyGOP set to release controversial Biden report McConnell locks down key GOP votes in Supreme Court fight Senate Republicans face tough decision on replacing Ginsburg MORE (R-Iowa) separately said he is open to passing legislation if the Trump administration’s current effort to ban them through regulation fails.

A bump stock wasn’t used in the Florida shooting. But they came onto the nation’s radar after they were reportedly used during a shooting at a concert in Las Vegas where 56 people were killed.

“Red flags”

Both Rubio and Schumer have pointed to allowing law enforcement or close family members to use a court order to temporarily block an individual deemed dangerous from being able to buy or posses a gun as a priority.

Sens. Richard Blumenthal (D-Conn.) and Lindsey Graham Lindsey Olin GrahamMcConnell locks down key GOP votes in Supreme Court fight Will Republicans' rank hypocrisy hinder their rush to replace Ginsburg? Momentum growing among Republicans for Supreme Court vote before Election Day MORE (R-S.C.) also said they are working on “red flag” legislation. The two senators are expected to introduce their bill next week.

“Our government encourages our citizens that if you see something, say something. We also need ‘do something,’ ” Graham said in a statement.

Straw purchases

Cracking down on straw purchases, when an individual who can pass a background check buys a gun for someone who can’t, appears to have support from across the Senate’s political spectrum.

Rubio said he is working on legislation that would provide more resources for prosecutors to go after the individuals who buy the gun. And Sanders name-dropped the issue during his floor speech outlining how Congress should respond to the Florida shooting.

Meanwhile, GOP Sen. Susan Collins Susan Margaret CollinsMcConnell locks down key GOP votes in Supreme Court fight Most Americans think winner of election should pick next Supreme Court justice: poll Murkowski: Supreme Court nominee should not be taken up before election MORE (Maine) and Democratic Sen. Patrick Leahy Patrick Joseph LeahyBattle over timing complicates Democratic shutdown strategy Hillicon Valley: Russia 'amplifying' concerns around mail-in voting to undermine election | Facebook and Twitter take steps to limit Trump remarks on voting | Facebook to block political ads ahead of election Top Democrats press Trump to sanction Russian individuals over 2020 election interference efforts MORE (Vt.) introduced legislation last year that would make such gun purchases a stand-alone criminal offense.