Former Alaska Gov. Sarah Palin's (R) hot streak of backing winning candidates in contested primaries ended Tuesday, as her preferred candidate, former Missouri state Treasurer Sarah Steelman (R), lost her Senate primary.

Palin, who had endorsed many long-shot candidates in 2010, only to see them lose, has been much more careful in her endorsements this cycle — and the results had paid off. 

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Her biggest win was with Nebraska state Sen. Deb FischerDebra (Deb) Strobel FischerMeet the Democratic sleeper candidate gunning for Senate in Nebraska Tariff fight could hit GOP in key Senate states Russia, China eclipse US in hypersonic missiles, prompting fears MORE (R), who pulled off a shocking upset win for Nebraska's open Senate seat. But she'd also jumped in for a number of Tea Party candidates who already had the momentum, including Indiana state Treasurer Richard Mourdock (R) and former Texas Solicitor General Ted CruzRafael (Ted) Edward CruzCruz's Dem challenger slams Time piece praising Trump Race for Republican Speaker rare chance to unify party for election 32 male senators back Senate women's calls to change harassment rules MORE (R). She's also backed two establishment picks against insurgent candidates: Sen. Orrin HatchOrrin Grant HatchSenate Finance leaders call on Commerce to improve the tariff-exclusion process GOP senators raise concerns about babies on Senate floor House passes series of bills to improve IRS MORE (R-Utah), who easily won his primary, and Rep. Jeff FlakeJeffrey (Jeff) Lane FlakeOvernight Energy: Senate confirms Bridenstine as NASA chief | Watchdog probes Pruitt’s use of security detail | Emails shine light on EPA science policy changes Arizona GOP tinkers with election rules with an eye on McCain's seat Heitkamp becomes first Dem to back Pompeo for secretary of State MORE (R-Ariz.), who is expected to win his late-August race.

Palin's support of Steelman unquestionably gave the candidate a late boost — both of her opponents said they'd seen a surge in support for her in the closing days of the race after Palin endorsed and came in to stump with her. But it wasn't enough, and Steelman finished in third place with 29 percent of the vote.

The former Alaska governor is backing two more candidates facing tough races: Freshman Rep. Sandy Adams (R-Fla.) is facing off against longtime Rep. John Mica (R-Fla.) next Tuesday, in a race where Mica is thought of as the favorite, and former talk radio host Martha Zoller (R) is in a Georgia House primary runoff where she seems to have the edge.