The same Robert VerBruggen cited two posts below, who pokes about in data sets for RealClearPolicy, looks at the conflicting polling results on illegal immigration and concludes you can get whatever answer you seek, depending on how you word the questions.
Actually, this is something everyone who has done survey research knows only too well. VerBruggen believes all such polling can be ignored by politicians. That is nonsense.
I am certain Republican members of the House of Representatives are crystal clear as to the views of those constituents whose votes they've earned in the past. GOP voters oppose amnesty, unequivocally. Ask Eric Cantor, former Rep. from VA how GOP primary voters viewed his squishy acceptance of amnesty.
GOP voters might be okay with a guest worker program for farm labor, with proper controls, under a president who follows the law as passed. Mostly, they want better control of our borders, something hard to achieve with a President who finds such controls politically counterproductive.