WASHINGTON, D.C. — President Barack Obama’s push for tougher gun measures and expanded background checks has placed several moderate Senate Democrats facing re-election next year in a bind, forcing them to take sides on a deeply personal issue for rural voters.

The choice: Either they stick with Obama and gun control advocates – and give an opening to campaign challengers and the National Rifle Association to assail them – or they stand with conservative and moderate gun owners back home worried about a possible infringement on their rights.

Five Senate Democrats – Mark Begich of Alaska, Mark Pryor of Arkansas, Mary Landrieu of Louisiana, Max Baucus of Montana and Kay Hagan of North Carolina – are seeking another term in states carried by Republican Mitt Romney last fall. For the next few weeks, at least, the spotlight will be on how they maneuver as the Senate debates gun-control legislation pushed by Democrats in response to the deadly Newtown, Conn., elementary school shooting.

Two other GOP-leaning states with large numbers of gun owners – West Virginia and South Dakota – will have open seats following Democratic retirements. Republicans have placed many of these states at the top of their priority lists as they try to gain six seats to win back the Senate majority.

Debate begins next week on Senate legislation that would require nearly all gun buyers to submit to background checks, toughen federal laws banning illicit firearms sales and provide more money for school safety measures.

The background checks are viewed by gun control advocates as the best step to prevent criminals and the mentally ill from accessing weapons. The NRA has opposed the expansion of background checks, saying it could lead to federal registries of gun owners. It has sought better enforcement of existing laws, which it contends is too easy for criminals to circumvent.

“There’s a fear in these states that this is going to go further and farther than anyone has suggested,” said Chris Kofinis, a Democratic strategist and former chief of staff to Sen. Joe Manchin, D-W.Va. But he said efforts to curb gun violence were aided by the emotional toll of the Sandy Hook shootings, in which 20 children and six adult educators were killed. “Newtown changed everything,” he said.

Thus, these Senate Democrats are weighing the possibility of angry voters next year against pressure from fellow Democrats. So far, they’re divided.

Baucus, the only Democrat with the NRA’s top rating, said he will vote against the bill as it currently stands. He pointed to the 18,000 phone calls his office has received about it – he said only 2,000 of those callers favored it.

“I represent Montana – that’s my first loyalty,” Baucus said. “They’re my employers. That’s why I’m here.”

Baucus knows the perils of a debate over firearms. He supported a 1994 crime bill sought by President Bill Clinton that included an assault weapons ban and survived a vigorous challenge from Republicans two years later.