Speaking in the border city of El Paso, Texas, Tuesday, President Barack Obama challenged Republicans to cross party lines and support his plans for America's immigration policy.
Obama charged that his GOP opponents will "never be satisfied," despite his administration's attempt to meet their demands for increased border security.
"We have gone above and beyond what was requested by the very Republicans who said they supported broader reform as long as we got serious about enforcement," Obama said.
"But even though we've answered these concerns, I gotta say I suspect there are still going to be some who are trying to move the goal posts on us one more time," he said.
"They'll say we need to triple the border patrol or quadruple the border patrol. They'll say we need a higher fence to support reform," he continued. "Maybe they'll say we need a moat. Or alligators in the moat."
The president wants to create a path to citizenship for the estimated 11 million illegal immigrants in America. But Republicans disagree with his comprehensive effort.
"The president's off talking about comprehensive reform. We've been down that road before," House Majority Leader Eric Cantor, R-Va., said Tuesday. "I believe, in turn, we should do things that actually produce some progress and results."
Experts say Congress won't pass immigration legislation. Some view Tuesday's speech in Texas as Obama's attempt to get the Hispanic vote for the 2012 elections.
More Latinos than ever voted in the 2010 midterm elections, according to the Pew Hispanic Center, accounting for almost 7 percent of those voting.
The White House denies any political posturing, saying the president wants to boost public support for immigration reform.
"We already know from the first two years, the last Congress, that there was political opposition to comprehensive immigration reform, including from some places where there used to be political support," White House Spokesman Jay Carney said.
"We are endeavoring to change that dynamic by rallying public support, by raising public awareness about the need for comprehensive immigration reform," he said.
Republicans who control the U.S. House have shown no interest in legislation that offers a pathway to citizenship for the nation's illegal immigrants.
"It seems President Obama has once again put on his campaigner-in-chief hat. The president's push to legalize millions of illegal immigrants is purely political," said Rep. Lamar Smith, R-Texas, chairman of the House Judiciary Committee.
"And even though administration officials like to pretend the border is secure, the reality is that it isn't," he added.
Brendan Buck, spokesman for House Speaker John Boehner, R-Ohio, said that House Republicans had no plans to take up immigration legislation.
He argued that if Obama were serious about immigration reform, he would have reached out to Boehner on the issue, which Buck said he hasn't.