Immigration is the most important issue as that decides all other issues. since their 1965 immigration act democrats have been importing 70 million voters for their socialist policies, 70 million 3rd world immigrants legal and illegal from the 3rd world into the USA. this is why the country moved to the left.
the other politicians besides trump or walker are actually for more immigrants as their support of obama trade and H1B visas show. obamatrade allows trade in services which allows companies to import 3rd world workers directly from the 3rd world.
sorry but none other than Trump or Walker have made an issue of immigration which is really the only issue. because if that doesn't get reduced or halted then all other issues will fall to the leftists as they increase their numbers (the immigrants are leftists)
Cruz has a very thorough policy on immigration that mirrors Trumps, but also calls for a drastic reduction in Legal immigration as well.
Sorry, I don’t believe Walker is that strong on illegal immigration. He is beholden to big donors and the C of C.