Orlando, Florida (CNN) - Mitt Romney will face a skeptical audience that is opposed to nearly all of his positions on illegal immigration when he addresses a conference of Latino leaders in Orlando on Thursday.
The unofficial GOP nominee is expected to lay out some of his positions on the hot button issue at the gathering of the National Association of Latino Elected and Appointed Officials, a Romney campaign policy adviser said Wednesday.
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In a policy session at the conference just hours before Romney's scheduled speech, a labor organizer with the Service Employees International Union blasted Arizona's immigration law and other "copycat" laws across the country as legalizing "racial profiling." Romney has said he supports the Arizona law but does not see it as a model for the country.
Eliseo Medina, the Secretary-Treasurer of SEIU, warned more Latino leaders will settle their differences over immigration policies at the voting booth in the fall.
"There will be many more of us in 2014, 2016, 2020 and on into the future," Medina said.
Romney has come under growing pressure on the immigration issues ever since President Obama announced a White House policy change that halts the deportations of some undocumented youth.
"Romney has refused, in at least six different interviews, to say where he stands on the issue," Obama campaign spokeswoman Lis Smith said in a statement.
The GOP contender has blamed the president for the lack of progress on immigration reform.
"He said, for instance, to the question of illegal immigration, that he was going to deal with immigration his first year he was going to focus on that," Romney said at an event in Davenport, Iowa on Monday. "Did he do anything on immigration when he had a Democratic House and Senate? No. This is a president who has said one thing and done another."
Romney took a hard line stance on immigration throughout the Republican primary season. He promised to veto the DREAM Act, legislation that would provide a path to citizenship for young illegal immigrants.
"The question is if I were elected and Congress were to pass the DREAM Act, would I veto it and the answer is yes," Romney said in Iowa last December.
In recent months, Romney has softened that view, indicating he might be open to a Republican version of the DREAM Act that was being drafted by rising GOP star, Sen. Marco Rubio of Florida.
Earlier this week, Rubio's office said the senator had shelved the proposal in response to the president's move on deportations.
While some Republican leaders are adamantly opposed to any effort to provide a path to legal status for the undocumented, other GOP lawmakers are looking to Romney for guidance.
"I think we're going to wait until we hear what Governor Romney has to say on this issue," Senate Minority Leader Mitch McConnell, R-Kentucky, said earlier this week.
"There may be others behind me who want to address it. But my view, he is the leader of our party from now until November and we hope beyond," McConnell said.