Carroll has not mounted a serious challenge and Akaka is likely to win this contest.

CNN: Both parties vie for control of the Senate

Akaka, 82, was first elected to the Senate in 1990, after serving 14 years in the House.

CNN: Akaka wins Hawaii primary

And so did Senator -- and World War II vet -- Danny Akaka.

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Akaka voted against the Iraq war resolution in 2002, and, in June, he was one of just 13 senators who voted for a measure sponsored by Sen.

CNN: Akaka wins Hawaii primary

Saiki, while still in Congress in 1990, lost to Akaka.

CNN: HAWAII

The defense appropriations bill is coming up, and there is talk on Capitol Hill of attaching Senator Akaka's native Hawaiian government reorganization act, which as you know is very controversial.

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One in 5 U.S. senators is 70 or older, and some have retired rather than seek new terms, such as Hawaii's Daniel Akaka, who left office in January at age 88.

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Daniel Akaka won the Democratic primary Saturday by a margin of 54 percent to 45 percent despite tough opposition from Rep. Ed Case, the cousin of America Online founder Steve Case.

CNN: Akaka wins Hawaii primary

Daniel Akaka faces Republican pilot John Carroll.

CNN: Both parties vie for control of the Senate