ANCHORAGE, Alaska | Brushing aside the criticisms of pundits and politicos, Alaska Gov. Sarah Palin said she plans to jump immediately back into the national political fray — stumping for conservative issues and even Democrats — after she prematurely vacates her elected post at month's end. The former Republican vice-presidential nominee and heroine to much of the GOP's base said in an interview she views the electorate as embattled and fatigued by nonstop partisanship, and she is eager to campaign for Republicans, independents and even Democrats who share her values on limited government, strong defense and "energy independence." "I will...