Some Democrats refuse to back Obama

…A number of moderate Democrats like Texas Rep. Henry Cuellar and liberals like Sen. Bernie Sanders are declining to give their unqualified support for the president, saying they’re either too focused on their own races or are calling on the White House to cater to their agendas before they will offer an endorsement. Some up for reelection in red states or in swing districts fear that even showing up on stage with Obama will give their opponents an image to seize upon — much as Democrats did in 2008 when they repeatedly flashed shots of Sen. John McCain hugging President George W. Bush.

So as the president faces the dual challenges of energizing his base while wooing moderates, some Democrats in Congress are keeping their distance, with the president’s approval rating hovering in the mid-40s — and even lower in states like West Virginia, where moderate Sen. Joe Manchin is up for reelection.

Trouble in paradise?