President Barack Obama has received strong support from fellow Democrats on Capitol Hill during his five-plus years in the White House.

But that presidential advantage appears to be at rising risk.

As Tuesday's Wall Street Journal reported, a climbing number of Democratic federal lawmakers, including some congressional leaders, "are parting ways" with the president "on issues including trade, energy and health care as the gap widens between the political demands of keeping control of the Senate and advancing parts of the White House agenda."

And the political concerns shared by many congressional Democrats aren't limited to maintaining the party's Senate majority in this fall's elections.

Few analysts now give the Democrats any realistic chance of recapturing the House. That's a rough letdown from the party's heady expectations in the wake of President Obama's re-election victory 15 months ago.

Though Republicans retained their control of the House in 2012, their grip slipped from a 41-vote to a 33-vote edge (it's now 32).

Senate Majority Leader Harry Reid, D-Nev., and Colorado Sen. Michael Bennet, chief strategist of the party's attempt to hold that chamber, met with Mr. Obama on Monday in the Oval Office. Administration and party officials later dismissed reports of growing strains between Democratic lawmakers and the president.

However, as the Journal accurately put it: "Vulnerable Democrats are bluntly criticizing the rollout of the 2010 health-care law. Even an under-the-radar issue such as a flood-insurance bill has been a point of tension."

And even as assorted Senate and House Democrats running for re-election run away from the ongoing Obamacare debacle, more bad news about it came Tuesday.

From The Washington Post: "The Affordable Care Act will reduce the number of full-time workers by more than 2 million in coming years, congressional budget analysts said Tuesday in the most detailed analysis of the law's impact on jobs. After obtaining coverage through the health law, some workers may forgo employment, while others may reduce hours, according to a report by the Congressional Budget Office."

Voters can't blame those ill effects on any GOP lawmakers - because none of them voted for Obamacare. In a rare, sizable break with the president, even 34 House Democrats joined that unanimous Republican "no" vote on the Affordable Care Act, which passed that chamber by a mere 219-212 margin in 2010. Justified alarm over the law then helped the GOP win back the House later that year - and keep control of it in 2012.

And now the partisan solidarity Mr. Obama has generally enjoyed is clearly in jeopardy.

Yes, Republicans have serious divisions of their own, including a potentially defining rift on immigration reform.

Still, if Democratic resistance to the president keeps ascending, it will further undermine his already-shaky attempts to solely blame the GOP House for congressional inaction.

In other words, as for rubber-stamp approval from fellow Democrats for President Obama's policies, that party just might be over.