On another measure the governor supports — repeal of the death penalty — the state's voters are divided.
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Voters favor the assault weapons ban 62 percent to 35 percent, and they endorse 71 percent to 24 percent limiting gun magazines to 10 bullets, the poll found. The margin of error for the survey, which was conducted by telephone Dec. 28-30 and Jan. 2, is plus or minus 3.5 percentage points.
Ed Hatcher, a spokesman for the newly formed advocacy group Smart Gun Laws Maryland, welcomed the findings.
"This is an overwhelming sign of public support for stronger gun laws in the state," he said. "These are the kind of numbers the legislature cannot ignore."
But Del. Michael Smigiel Sr., an Eastern Shore Republican and gun rights advocate, said the numbers show the public's lack of understanding of their Second Amendment rights.
"People are too easily willing to give up rights under the false pretense they're gaining some safety," Smigiel said.
O'Malley is expected to propose a package of bills crafted to address gun violence, possibly including an asssault weapons ban, school safety proposals and expanded mental health services. He is considering whether to make repealing the death penalty part of his legislative agenda for the first time since 2009.
The death penalty issue is likely to be particularly hard-fought and could be decided by a margin of one or two votes in the state Senate. Senate President Thomas V. Mike Miller has promised a floor vote if the governor can muster enough support to pass a bill in that chamber.
The poll showed Marylanders are against repeal by a margin of 48 percent to 42 percent, but the margin has been narrowing in recent years.
Sen. Lisa A. Gladden, a Baltimore Democrat who has led the fight for repeal, said the poll numbers are more favorable to her cause than in the past.
"What it says, at least to me, is we're moving toward repeal," Gladden said. "These are the highest, closest numbers we've ever seen saying they support repeal."
Jane Henderson, executive director of Maryland Citizens Against State Executions, said that when pollsters ask people another question — whether they would support life without parole as an alternative to execution — they routinely say yes by margins of 60 percent or more.
Some voters tend to support capital punishment in the abstract, Henderson said.
"People have their first gut reaction to the death penalty, and then they learn more and they often change their minds," she said.
Del. Pat McDonough, a Baltimore County Republican, wants to go in the other direction. He plans to push measures that would require the death penalty for people convicted of serial killings, mass murder, contract killing or murdering police officers and correctional officers. He said many citizens don't believe life without parole is sufficient punishment and want to see killers executed.
"I believe they support it because 99 percent of the people would never in their worst moment, in their angriest time in life, ever consider harming another human being, let alone murdering another human being," McDonough said. " I believe that people are so horrified and so angered by seeing an innocent life taken, like the case of these children, that they believe the punishment must be the ultimate punishment."
Steve Raabe, president of OpinionWorks, said the poll shows that neither side of the death penalty debate can muster a majority of public support now. "There's no consensus," he said.