Former Republican state Sen. Jim Rubens is set to formally announce his plan to run for the U.S. Senate seat held by Democrat Jeanne Shaheen.
Rubens is making his announcement Wednesday morning in Concord.
Rubens ran for governor in 1998, losing in the Republican primary to Jay Lucas. Shaheen beat Lucas to win her second term as governor.
Rubens, a private venture investor, chaired the Granite State Coalition Against Expanded Gambling and worked to defeat bills to legalize casinos.