Longest ongoing streaks of party control for statewide offices

[Nichlemn]

What statewide offices have the longest ongoing streaks of electing only one party? What is/was the longest overall?

"Political party strength in US states" from Wikipedia should help (see bottom of page for state-by-state pages).

A few:

The AG, Auditor and Treasurer of Arkansas have been straight Democratic since at least the 1930s, so presumably back until Reconstruction. One of these is possibly the longest overall.
AG of Mississippi, Democratic since 1878
Louisiana US Senate (Class 2), Democratic since 1882
Maryland Comptroller. Democratic since 1900.
MA Auditor, Democratic since 1930
MT Senate (Class 2), Democratic since 1912


ND Auditor, R since 1894.
Kansas Senate (Class 1), R since 1918
Wyoming Treasuer, R since 1938

A lot of states are incomplete and probably have comparable streaks.

Any more? Anything unusually long in a state that is not known for having had one-party rule in recent history?

[Miles]

The NC Secretary of State has been D since 1876.

From what I can find, Democrats were elected to the NC Attorney General since 1901 (A Republican was appointed in the 1970s but defeated the next election).

[nclib]

Don't Wash. and S.D. have the longest D and R streaks respectively for Governor.

[RedSLC]

Don't Wash. and S.D. have the longest D and R streaks respectively for Governor.

Yup.

Washington last elected a republican governor in 1980 (John Spellman), and S.D. last elected a democratic governor in 1974 (Richard Kneip), though he resigned to become Carter's Ambassador to Singapore, making his L.G., Harry Thayer, the state's last dem governor.

[publicunofficial]

Don't Wash. and S.D. have the longest D and R streaks respectively for Governor.

Yup.

Washington last elected a republican governor in 1980 (John Spellman), and S.D. last elected a democratic governor in 1974 (Richard Kneip), though he resigned to become Carter's Ambassador to Singapore, making his L.G., Harry Thayer, the state's last dem governor.

While Democrats have held the Governorship in Washington since 1985, Republicans have held the Secretary of State position since 1964. Although Kim Wyman just barely beat Kathleen Drew last year.

[○∙◄☻¥tπ[╪AV┼cVê└]

ND Auditor has been Republican since 1894.

In California, Jerry Brown was the first Democratic Secretary of State elected since 1890 (there was one appointed). However, don't be fooled by the fact that he's currently governor, he got elected to that position in 1970.

[Adam Griffin]

I need to do a bit more digging (already updated Wikipedia with a few elected officials' party affiliations that were missing), but I'm fairly confident that Georgia elected only Democrats to serve in the AG's office between 1854-2010 (156 years).

There is a caveat, though: Mike Bowers defected to the Republican Party in 1994 - halfway through his fourth term - and so the office was technically held by a Republican for two years (although he was not elected as one). So this probably doesn't count.

[bgwah]

Yeah, Washington has four long streaks at the moment.

Democrats have won every election for State Auditor since 1932, State Treasurer since 1956, and Governor since 1984. Republicans have won every election for Secretary of State since 1964.

The Senate seat currently held by Patty Murray comes pretty close, voting Republican once in 1980 but Democrat in every other election since 1932.

[Nichlemn]

Yeah, Washington has four long streaks at the moment.

Democrats have won every election for State Auditor since 1932, State Treasurer since 1956, and Governor since 1984. Republicans have won every election for Secretary of State since 1964.

The Senate seat currently held by Patty Murray comes pretty close, voting Republican once in 1980 but Democrat in every other election since 1932.

The most odd-seeming streaks, I would think. Looks to me like it's partially explained by long-servicing incumbents in each case. I don't really see why there'd be some intrinsic reason for voters to want Republican Secretaries of State, for instance.

[nclib]

Isn't Baucus' seat the second longest Dem streak after Landrieu's? I believe the two longest streaks for the GOP are the two Kansas seats.

[TX Conservative Dem]

Longest statewide office political party streaks:

Michigan Secretary of State since 1994 (R)
TX Supreme Court (R) since 1998
TX Court of Criminal Appeals since 1998 (R)
TX Railroad Commission since 1994 (R)
TX Governor's Mansion since 1994 (R)
California's two US Senate seats since 1992 (D)
Florida Governor's Mansion since 1998 (R)
Arizona-United States Senator, Class 3 (R) since 1968
Arizona-United States Senator, Class 1 (R) since 1994
South Carolina-United States Senator, Class 2 (R) since 1964: Thurmond switched to the GOP in '64
Both of Texas' US Senate seats (R) since 1993
Alabama's two US Senate seats (R) since 1994: Shelby switched to the GOP in the aftermath of the '94 midterms