Obama launches re-election bid via e-mail, website

Monday, April 4, 2011 | 11:22 a.m. CDT; updated 11:31 a.m. CDT, Monday, April 4, 2011

WASHINGTON — President Barack Obama formally launched his re-election campaign Monday, urging grassroots supporters central to his first White House run to mobilize again to protect the change he's brought over the past two years.