In response to last week's mass shooting at a community college in Oregon, Senate Democrats have launched a renewed effort to pass gun control reform.

On Thursday, congressional Democrats unveiled legislation aimed at regulating the massive sale of firearms in the U.S. by eliminating background check loopholes, expanding the background check database and cracking down on illegal gun purchases. The Democrats also vowed to block other bills until their measures get a vote, reports The New York Times.

The package includes a version of the bipartisan Manchin-Toomey bill of 2013, which was introduced following the mass shooting at an elementary school in Newtown, Connecticut. The bill, however, failed to secure the 60 votes needed to overcome a filibuster.

Leading the push for gun regulation are Democratic Sens. Chuck Schumer and Debbie Stabenow, who recalled several deadly mass shootings in the U.S. over the past few years and stressed the need for "sensible gun reform legislation" during a press conference, reports NBC News.

They also sent a letter to their Senate colleagues outlining the measures in their proposal.

"The American people are heartbroken and outraged" after last week's mass shooting at Umpqua Community College in Roseburg, reads the letter.

According to the letter, the proposal would "bolster the background check system by strengthening it and stopping those who try to evade it." It also calls for "shutting down the illegal pipeline of guns." In addition, the senators would bar "all domestic abusers" from purchasing firearms, while preventing people from buying guns until they complete a background check.

While speaking to MSNBC's "Morning Joe" Thursday morning, Democratic Sen. Joe Manchin that the legislation made sense after Sandy Hook, and it "makes sense now."

"If we're going to protect the rights of law-abiding gun owners, then we've got to stand up as law-abiding gun owners," he said, adding that gun reform is "common sense."