He's more conservative than most Republican senators.
A majority of laws are passed after July in the second year of House terms. It has become conventional political wisdom that House Republicans will be open to compromising on immigration reform in the last few months before the 2014 midterms.
Asians and Hispanics will be 50 percent of new voters for 21 GOP districts in 2014. They will be 40-49 percent of new voters for 10 districts and 30-39 percent of new voters for 32 other districts. That's 63 Republican controlled districts in which many new voters will care about where their Congressperson stands on issues of immigration reform.