He claimed House Republicans oppose bringing up immigration reform by "a three or four to one" margin.
The Iowa congressman said reform opponents must keep the heat on Republican leaders so that they don't change their minds.
"We still have to man the watchtowers because things could change," he said.
Boehner, released a pro-reform blueprint two weeks ago, reversed course last week by saying it'd be "difficult" to move any immigration bill because Republicans don't trust President Barack Obama to implement the law. He subsequently rejected a compromise offered by Democrats to pass reform now and have it take effect after Obama leaves office.
And yet, Boehner is making Republicans vulnerable to being portrayed as the party of Steve King: the only bill he has brought up and passed so far in the 113th Congress is King's legislation to deport people brought to the country illegally as children.