(Iowa) -- Senator Chuck Grassley of Iowa is running for reelection. Grassley posted on Twitter this morning that he and his wife recently made the decision he should run for a ninth term. He's currently the tenth-longest serving senator in U.S. history at 40 years in office and is the second-longest serving senator currently in office. If he completes a eighth term he'll be 95-years-old by the end. Grassley is 88 years old.