Obama might not have the sort of public support on immigration reform that his party wants. (Charles Dharapak/Bloomberg News)

Americans are changing their minds about immigration policy.

The country is increasingly prioritizing heightened border security over greater access to citizenship for the country's millions of undocumented immigrants, according to a poll released on Wednesday by the Pew Research Center. Roughly a third of the U.S. population now believes securing the U.S.-Mexico border and enforcing immigration laws should be the priority for the country's immigration policy, while only 23 percent think easing the path to citizenship for those residing in the country illegally should be the main focus.

Less than a year ago, support for each was neck and neck, at 25 percent.

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This shift comes as Obama mulls taking executive action to delay the deportation of the millions of undocumented immigrants living in the United States. This possibility has alarmed Democratic candidates battling in closely contested mid-term races across the country where the subject of immigration reform remains divisive.

The Obama administration originally promised the president would push through immigration reform by the end of the summer, but the timetable now seems uncertain. There's reportedly a chance the president will wait a bit longer, which could very well mean until after the mid-term elections.