Presidential rivals target key states

President Barack Obama and Republican rival Mitt Romney are embarking on a travel-heavy week through battleground US states, with both campaigns wrangling over unrest in the Middle East and who is best equipped to rejuvenate the economy.

Both candidates are courting voters in a series of key states and reaching out to a number of voting groups that could determine the election, from working-class white voters in states like Ohio and Wisconsin to Latino voters in Florida and viewers of a popular Spanish-language television network.