From NBC News 

By From Chuck Todd, Mark Murray, Domenico Montanaro, and Brooke Brower

*** A make-or-break week on guns: As we’ve already previewed, this is shaping up to be a very busy month on Capitol Hill, with a shower of activity on immigration, guns, and President Obama’s budget. Yet this week in particular has become a make-or-break week when it comes to the chances of the Senate passing meaningful gun-control legislation. Here’s all the different activity, per NBC’s Kasie Hunt: Obama delivers a speech today in Hartford, CT at 5:45 pm ET after the state passed tough new gun regulations last week; Vice President Biden tomorrow holds a gun-related event at the White House; families from Newtown, CT will lobbying Capitol Hill this week after being interviewed by CBS yesterday; Senate Majority Leader Harry Reid will decide what legislation to push and how; and Senate Republicans will consider how to go forward with any filibuster. Hunt adds that there’s a glimmer of progress in negotiations over universal background checks between Sens. Joe Manchin (D-WV) and Pat Toomey (R-PA). The Washington Post has more: “Manchin and Toomey are developing a measure to require background checks for all gun purchases except sales between close family members and some hunters, which addresses concerns of some conservatives.” It’s worth pointing out that Toomey is up for re-election in increasingly blue Pennsylvania in 2016. And given that his political identity is Mr. Fiscal Conservative, he might have a little bit more freedom on a cultural issue like guns.