HELENA, Mont. -

Republican U.S. House nominee Ryan Zinke has his work cut out for him as he seeks to unite his party and rebuild his campaign's bank account after a narrow and expensive primary win.
    
He needs to do both in a hurry, with his opponent, Democratic nominee John Lewis, cruising to a primary victory Tuesday and flush with more than $500,000 in cash.
    
Zinke said Wednesday the five-way GOP House primary may be the most expensive in Montana history, but his donor base is strong and he is confident the party will unite behind him after receiving just 33 percent of Tuesday's vote.
    
Lewis is making his first run for political office. He says he plans to focus on his vision for Montana and not on partisan attacks from his opponents.