DENVER — On the eve of the official nomination of presidential candidate Barack Obama, the Illinois senator and son of an immigrant, some of the leading voices shaping the Democratic Party’s immigration reform platform reveal a mix of reserved optimism and pragmatism.

While the Blue Dog Democrats a group of 47 moderate and conservative Democratic Party members of the United States House of Representatives support a position on immigration that bears more than a passing resemblance to the '"enforcement only"' approach of many Republicans, other Democrats support a combination of legalization and major reforms as alternatives to the raids and detentions that defined the Bush era of immigration.

In between these two positions are a significant number of Democrats and their supporters who want to focus primarily on legalization without including any significant changes to the policies that enable raids and massive detention like this week’s raid in Mississippi. In that raid, U.S. immigration agents arrested 595 people at a factory in what was the largest workplace-enforcement raid in the United States to date.

Outside of the Pepsi Center, where the Democrats are huddling, are hundreds of immigrant-rights groups planning a major mobilization today the day of Obama’s acceptance speech. They will protest what they believe is the unwillingness of Democrats and their Washington-based immigrant rights allies to seriously support what the press release of the March 25th Coalition calls '"human legalization and a moratorium on raids and deportations."'

As she anxiously awaits the end of Bush era, Rep. Zoe Lofgren (D-Calif.), chair of the House Judiciary Subcommittee on Immigration, Citizenship, Refugees, Border Security and International Law, says she sees real change on the immigration horizon.

'"I’m confident that with an Obama presidency we will have comprehensive immigration reform in the first term but it’s not going to be easy."'

Lofgren, a former immigration attorney, and other panelists speaking at one of the few events on immigration among the hundreds at the convention, were cautiously optimistic. But they also expressed a number of different interpretations of what the types of policies define "comprehensive immigration reform."

For her part, Lofgren, who did not support the McCain-Kennedy bill which combined policies legalizing the more than 12 million undocumented immigrants in the United States with policies increasing the number of ways to persecute, prosecute, jail and deport future undocumented immigrants — said she believes that '"an important part of the answer is not to have so many people who do not have legal status."'

But at the same time, she believes that something must be done to bring an end to a '"whole (detention) system that is wrong and causing lots of suffering."' Lofgren and a number of other Democrats in Congress cite the recent case of the Chinese immigrant Hui Lui Ng, who died in immigration detention just two weeks before the convention.

Though he, too, decries the raids, detention and deportation cited by Lofgren and others as the '"least humane part of the broken immigration system,"' Simon Rosen-berg, president and founder of the New Democrat Network (NDN), which sponsored the panel, is not optimistic that these issues will be included in whatever reform package gets introduced next.

'"Although desirable, I think it would be difficult to include fixing the detention and (immigration) judicial system in comprehensive immigration reform, because it really wasn’t a critical part of what came about last time,"' said Rosenberg. '"It doesn’t mean that it shouldn’t get done. I’m just not sure if that’s the best vehicle for it. If the goal is to include these issues in comprehensive immigration reform, then we have lots of work to do to make them front and center in this debate."'

Frank Sharry, executive director of America’s Voice, a Washington-based immigration reform group, admitted that he and other supporters of the McCain-Kennedy legislation failed because they '"made concessions"' on detention, enforcement and other issues in order to woo Republicans, who, Sharry said, '"failed to bring any votes."'

'"We knew the Senate bill was deeply flawed, but we believed the legalization component for the 12 million immigrants was decent, and the family reunification provisions could be fixed before the final passage,"' Sharry said.

Sharry also stated that he and others were '"hopeful"' they could change some of the more than 700 pages of enforcement language in the McCain-Kennedy legislation.

For his part, Congressman Raul M. Grijalva, whose district in McCain’s home state of Arizona was referred to during hallway talk at the DNC as '"ground zero"' for the immigration reform debate, said he has been pushing for his colleagues to place a priority not just on legalization, but on detention and raids as well.

'"We can’t wait any more when it comes to demilitarizing and improving enforcement and detention,"' Grijalva said, as he received word of the ICE raid in Mississippi. '"It’s what I hear in my district all the time; all the time. And things have gotten better for us (Democrats) in the past five years. Our side has to get tougher. We can’t afford to be as muted this time."'