The potential presidential candidates have been criticized by conservatives over immigration . Obama has said he would work with Congress to pass comprehensive reform of the nation's immigration laws if elected president. Texas Gov . Rick Perry , another relative moderate on the issue , has been more aggressive .
The potential presidential candidates have been criticized by conservatives over immigration . Jeb Bush and Marco Rubio , moderates on immigration , keeping a low profile in border crisis . Texas Gov . Rick Perry , another relative moderate on the issue , has been more aggressive .