The growing numbers of Latino voters living in critical swing states could have a powerful impact on this year's US presidential race.

The fastest growing ethnic group in the country looks set to play a particularly significant role in four key states: Nevada, Colorado, Virginia and North Carolina.

However, as often anti-immigrant Republican rhetoric continues, and amid the Obama administration's record deportation numbers, getting Latino voters to move beyond their disillusionment will be a major challenge for both parties.

Al Jazeera's Rob Reynolds reports from Phoenix.