CNN : Obama says he will file papers soon . NEW : Obama : We need to mobilize ` ` long before '' the time to seriously campaign . He is making his formal announcement slightly earlier than is typical for an incumbent . And at the bottom of the website , the candidates ' names are clearly identified : OBAMA-BIDEN -- for Vice President Joe Biden . So far no Republican contenders have formally announced .
CNN : Obama says he will file papers soon . NEW : Obama : We need to mobilize ` ` long before '' the time to seriously campaign . He is making his formal announcement slightly earlier than is typical for an incumbent . So far no Republican contenders have formally announced .