Liberals and conservatives, on and off Capitol Hill, have sprung into action to urge lawmakers not to cede ground in the ongoing deficit talks, complicating the latest marathon push to strike a deal and raise the debt ceiling.

President Obama and Vice President Biden plan to meet Tuesday afternoon with lawmakers from both parties, following up on back-to-back meetings since Sunday. The talks so far have failed to yield a compromise ahead of what the administration claims is an Aug. 2 deadline to raise the $14.3 trillion debt ceiling.

Their respective bases aren't making things any easier....