Just hours after the deadliest mass shooting in the United States, Las Vegas police are still identifying and counting the lives lost at the scene of the active investigation. President Trump addressed the nation calling for unity following the massacre that killed at least 58 people and injured more than 400 concertgoers.

Meanwhile, in the wake of tragedy, Democrats are using the deadliest mass shooting as a platform to attack the GOP and push for stricter gun control policies.

Here is an ongoing list:

In a series of tweets, Senator Ed Markey (D-MA) slammed the GOP and the NRA. One tweet read, "And once and for all, we need to make NRA stand for “Not Relevant Anymore” in American politics." In his 11th consecutive tweet in response to the tragedy, the Senator posted his gun violence legislation in addition to calling for a ban on all assault weapons.

The epidemic of #gunviolence in our country is not preordained. It is preventable. It is time #GOP stops blocking #guncontrol legislation. — Ed Markey (@SenMarkey) October 2, 2017

Massachusetts Democratic Senator Elizabeth Warren, says there needs to be a conversation to address gun violence "NOW":

Tragedies like Las Vegas have happened too many times. We need to have the conversation about how to stop gun violence. We need it NOW. — Elizabeth Warren (@SenWarren) October 2, 2017

House Minority Whip, Congressman Steny Hoyer (D-MD) chimed in saying the nation cannot be immune to gun violence:

We must not, as a nation, allow ourselves to become immune to the pain of mass gun violence; this is not and must never be normal. 2/2 — Steny Hoyer (@WhipHoyer) October 2, 2017

Former Democratic Party Chairwoman Debbie Wasserman Schultz's (D-FL), first and the only tweet on the issues at 7 am Monday morning, tweeted the following:

The tragedy in Las Vegas is heartbreaking. Enough is enough. It's time to do something about the scourge of gun violence in this country. — D Wasserman Schultz (@DWStweets) October 2, 2017

In addition, Wasserman Schultz posted an additional message on Facebook calling for Congress to act on gun control.

Sen. Chris Murphy (D-CT) issued a statement, saying, "It’s time for Congress to get off its ass and do something":

Sen. Chris Murphy releases statememt on Las Vegas shooting:



"This must stop...It's time for Congress to get off its ass and do something" pic.twitter.com/hymdP7r5nx — NBC Politics (@NBCPolitics) October 2, 2017

Senator Corey Booker also took to Twitter to respond to the massacre saying it's time to use "common sense, widely supported steps to reduce such violence":

We are not powerless against such evil. We must take common sense, widely supported, steps to reduce such violence, agony and grievous loss. — Cory Booker (@CoryBooker) October 2, 2017

Senator Bob Casey (D-PA) posted a series of tweets saying prayers for the victims are not enough. The United States Senator politicized the attack by saying the nation's security will continue to be at risk "because Congress refuses to take real, meaningful action" on gun violence.

The nation’s security continues to be at risk because Congress refuses to take real, meaningful action to curb gun violence. — Senator Bob Casey (@SenBobCasey) October 2, 2017

If Congress continues to fail its most basic obligation to keep America safe, then these mass shootings will continue to occur. — Senator Bob Casey (@SenBobCasey) October 2, 2017

Senator Jeff Merkley (D-OR):

How many more parents need to bury their children before Congress acknowledges the need to take action to reduce gun violence? #StopTheHate — Senator Jeff Merkley (@SenJeffMerkley) October 2, 2017

Rep. Robin Kelly (D-IL) says that Congress needs to 'step up and stop hiding behind the Second Amendment'

Rep. Jan Schakowsky (D-IL):

House Minority Leader Nancy Pelosi (D-CA) sent a letter to Speaker of the House Paul Ryan (R-WI) calling for Congress to act:

South Carolina Democrat, Rep. James Clyburn:

Senator Patty Murray (D-WA):

Sen. Robert "Bob" Menéndez (D-NJ):

Rep. Andre Carson (D-IN):

Rep. Nydia Velazquez (D-NY):

Rep. John Larson (D-CT):