(CNN) - Is Arizona truly a battleground state?
The jury's still out, but a second straight survey this week does indicate that it's all knotted up between President Barack Obama and presumptive Republican presidential nominee Mitt Romney in Arizona.
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According to a Rocky Mountain Poll released Wednesday, 42% of registered voters in Arizona say they support Obama, with 40% backing Romney and a high 18% undecided. The president's two percent margin is well within the survey's sampling error, meaning it's basically a dead heat in Arizona.
A poll released Monday from Arizona State University's Merrill/Morrison Institute indicated 42%-40% margin for Romney among registered voters in Arizona, again a dead heat.
The two point margin for Obama in the new Rocky Mountain poll is a switch from January, when Romney held a six point advantage over Obama.
According to the new poll, Obama holds a 16 point advantage over independent voters and a 39 point lead among Hispanic voters.
Bill Clinton's 1996 win in Arizona was the last time the Democrats carried the state in a presidential election. Sen. John McCain won his home state by 8 points over Obama in 2008.
But with McCain not on the ballot this time around, and with the state's Hispanic population continuing to grow, Democrats think they can put Arizona in play this November.
"We think we have a real shot at winning the presidential race here in Arizona," said Vice President Joe Biden, campaigning in the state last week.
Biden added the Obama re-election campaign was actively working to generate support in the state.
But Republicans disagree. Last week Republican National Committee Chairman Reince Priebus, on a conference call with reporters, said the idea of Arizona turning blue was a "mirage."
The Rocky Mountain Poll was conducted by Behavior Research Center from April 9-17, with 511 registered voters in Arizona questioned by telephone. The survey's overall sampling error is plus or minus 4.4 percentage points.
CNN's Kevin Liptak contributed to this report