In case you missed it, Grand Forks Herald says it nicely:

Here's a tip for North Dakota Democrats who'd like to use “eight years is enough” as a campaign theme against Republican Gov. John Hoeven:
Don't.
The double standard is so laugh-out-loud funny that the speaker might as well be wearing a clown suit.
Here are some things that would have to be true in order for prominent Democrats' call for term-limiting Hoeven to be believed:
-- Their suggestion that “eight years is enough” would have to apply to the state's congressional delegation, too.
But it doesn't. Sen. Kent Conrad, D-N.D., has held his current Senate seat since 1992. He held the seat now occupied by Sen. Byron Dorgan, D-N.D., for six years before that. That's a total of 21 years.
Speaking of Dorgan, he was elected to the Senate in 1992, 15 years ago. Fifteen years: That would be eight years plus seven years, “eight is enough” Democrats should recall. And before getting elected to the Senate, Dorgan served in the House for 12 years.
As for Rep. Earl Pomeroy, D-N.D., he also was elected to Congress in 1992, 15 years ago. In 2000, Pomeroy ran for his fifth term against Republican John Dorso. Funny, but we don't recall “Eight is enough” being used against Pomeroy in that campaign, at least not by Democrats.
-- In 1991, the Democrats were telling then-Gov. George Sinner, a Democrat, that he shouldn't run again. But they weren't. Several times in 1991, newspaper stories analyzed Sinner's prospects for getting reelected to a third term, the Herald's archives show. Not one of those stories quotes a Democratic leader saying anything close to “eight is enough.”
-- Leading Democratic spokespeople for the “eight is enough” view also apply that standard to themselves.
But they don't. Here's a message from state Sen. Joel Heitkamp, D-Hankinson, to Hoeven: “You've had eight years to accomplish what you've (wanted), now get out of the way and let someone else,” Heitkamp told a reporter.
Heitkamp first was elected to the North Dakota Senate in 1994, 13 years ago.
State Sen. Tim Mathern, D-Fargo, is considering a run for governor. Mathern's a fine man and will make a great candidate, but only if he does better than this:
“Mathern says eight years is enough for someone to be governor,” The Associated Press reported.
Mathern has served as a senator since 1986.
Property taxes, yes. The North Dakota economy, yes. Hoeven's intentions regarding the U.S. Senate, yes. All of those issues are fair game in the gubernatorial race.
But not term limits, at least when the would-be “term-limiter” happily blew past eight years in office half a decade or more ago. For such a critic, it ought to be hard even to say “eight is enough” and keep a straight face.