There are only two incumbent federal candidates on the ballot in Alaska.  Both are facing primary and general election challenges.  As the Anchorage Daily News reports, both are also facing the possibility of criminal indictments:

Campaigning under the cloud of federal investigations is tough enough, but could Sen. Ted Stevens or Rep. Don Young have the added worries of an indictment before they face the voters? Would prosecutors wait until after the election to bring charges to avoid the appearance of meddling in Alaska politics?

It's been 21 months since the federal corruption investigation surfaced in Alaska with a series of dramatic raids on legislative and other offices. Eight cases have been brought, resulting in convictions in all but one -- and that matter is still pending.

No one outside the government is privy to where the investigation is headed and whether it will eventually lead to charges against Stevens and Young, who deny wrongdoing but who won't discuss specifics about the allegations.

It remains especially difficult to charge members of Congress for matters related to legislation. The Constitution's Speech or Debate Clause offers a broad shield against interference by the Justice Department and other agencies of the executive branch into how a congressman might have created, for example, an earmark that benefited a campaign contributor, family member or former aide -- matters that are part of the investigations of Young and Stevens.