WASHINGTON–House Speaker John Boehner on Thursday joined other top congressional Republicans suggesting an immigration overhaul this year is increasingly unlikely, citing competing legislative approaches and a lack of trust among the GOP towards President Obama.

“There’s widespread doubt about whether this administration can be trusted to enforce our laws, and it’s going to be difficult to move any immigration legislation until that changes,” Boehner, R-Ohio, told reporters Thursday.

Senate Minority Leader Mitch McConnell, R-Ky., already threw cold water on immigration prospects Tuesday when he said there was an “irresolvable conflict” between the Senate’s comprehensive legislative approach and the piecemeal approach sought by House Republicans.

“I don’t see how you get to an outcome this year with the two bodies in such a different place,” McConnell said.

But White House spokesman Jay Carney held out hope, saying many Republicans still believe something should be done on immigration. “We remain optimistic about the prospect for comprehensive immigration reform in 2014,” he said Thursday.

Contributing: David Jackson