The potential presidential candidates have been criticized by conservatives over immigration . ` It is clear we have a humanitarian crisis on our border . President Bush and Marco Rubio , moderates on immigration , keeping a low profile in border areas . Texas Sen . Rick Perry , another relative moderate on the issue , has been more aggressive .
The potential presidential candidates have been criticized by conservatives over immigration . President Bush and Marco Rubio , moderates on immigration , keeping a low profile in border areas . Texas Sen . Rick Perry , another relative moderate on the issue , has been more aggressive .