campaign

Key Gingrich aides resign

WASHINGTON (AP) -- Newt Gingrich's campaign manager and numerous other key aides have resigned together, a strong blow to his hopes for the Republican presidential nomination.

Pawlenty proposes three-tier income tax system

Republican Tim Pawlenty was set to propose an economic policy Tuesday that would simplify individual tax rates to just three options and cut taxes on business by more than half as he offered himself as a replacement to Barack Obama in the Democratic president's hometown.