Philip Wegmann writes at The Daily Signal:

A Supreme Court justice nominee appointed by President Barack Obama could do much to shift the ideological weight of a bench split now evenly among justices nominated by Republican and Democrat presidents.

In particular, the new justice could provide the deciding vote to overturn the District of Columbia v. Heller decision. In that landmark case, the Supreme Court ruled 5-4 that the 2nd Amendment protects the individual’s right to possess and own a firearm.

But four pro-gun Democrats in the Senate didn’t respond to The Daily Signal’s request for comment about whether they would support an Obama nominee who opposes the Second Amendment.

Sens. Joe Donnelly of Indiana, Heidi Heitkamp of North Dakota, Joe Manchin III of West Virginia, and Jon Tester of Montana voted with Republicans and against Obama’s 2013 efforts to overhaul the nation’s gun laws.

Read the rest here.