Two Republican candidates already announced primary challenges to Snowe -- former Lisbon Falls Selectman Scott D'Amboise and tea party activist Andrew Ian Dodge . White House praises Sen. Olympia Snowe for her bipartisan leadership . Snowe known as moderate Republican who sometimes votes with Democrats . Maine GOP chairman says the decision is going to shake up state politics . Score: 6
White House praises Sen. Olympia Snowe for her bipartisan leadership . Snowe known as moderate Republican who sometimes votes with Democrats . Maine GOP chairman says the decision is going to shake up state politics . Score: 6