Obama won Iowa 's caucuses in 2008 ; now he 's drawing some frustration from his base . Says one dismayed voter : ` ` I ' m not going to vote at all this week . '' Iowa ##ns are mounting an aggressive effort to energize voters for Tuesday night . Republican voters continue to pummel the Democrats on the economy , health care .
Obama won Iowa 's caucuses in 2008 ; now he 's seeing some frustration from his base . Says one dismayed citizen : `` I 'm not going to vote at all this year . '' Iowa Democrats are mounting an aggressive effort to energize voters for Tuesday night . Republican candidates continue to pummel the president on the economy , health care .