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Thune Says He Will Block Obama

WASHINGTON (AP) - South Dakota Sen. John Thune is telling conservatives he'll use his position in the Senate leadership to try to block President Barack Obama's agenda.

Thune is among a crowded field of potential White House contenders speaking at the annual Conservative Political Action Conference. He told the group Friday that Obama is grabbing for more power and using broad regulation to get his way. He says Obama has already given the nation "more government, more debt, fewer jobs and less freedom."

Thune says it'll take a new president to take on Social Security entitlements, federal debt and national security problems.