By I-Hsien Sherwood (i.sherwood@latinospost.com) | First Posted: Mar 21, 2013 07:01 PM EDT

Lately, proponents of immigration reform have been optimistic about the progress of bipartisan bills in both the Senate and House of Representatives. But many pitfalls still remain, and the sooner an immigration reform bill emerges from Congress, the greater its chances of eventually passing.

In general, the longer a piece of legislation remains before Congress, with its partisan bickering, disparate constituencies and army of lobbyists each pursuing targeted ends, the more easily it is torn apart, poked through with exceptions and slandered in the press. A bill unsheltered is a bill likely doomed.

So while some conservatives opposed to immigration reform are raising policy objections, other are attempting a procedural flank.

Six Republican senators, led by Jeff Sessions of Alabama, sent a letter to Senate Judiciary Committee Chairman Patrick Leahy (D-Vt.) demanding that the process move more slowly and senators be given several months to review the bill.

In addition, the GOP is still reeling from its resounding loss in last year's presidential election, when 71 percent of Latinos voted to reelect their opponent, President Obama. That sent the Republicans into a bout of soul searching, prompting the latest openness to reform.

But that willingness may be short-lived, especially as the lessons of November fade and Congress gears up for primary battles from the conservative right and the Tea Party.

The window for reform is short, and the stakes are high, so the potential for heated arguments and tense standoffs increases, further endangering any kind of compromise bill.

For now, the Senate's "Gang of Eight" seems to be moving quickly and relatively smoothly toward a proposal, despite delays. They admit they'll miss their first self-imposed deadline at the end of the month, but the White House, which has been keeping the pressure on, says it is still confident they will present a worthwhile bill.

"The good news is that the Gang of Eight seems to be making progress. We are engaged with them. We are encouraged by their progress," Cecilia Muñoz, head of the White House Domestic Policy Council, which is spearheading the immigration initiative, said.

Whether Congress can maintain momentum on the issue remains to be seen.

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