Looks like Tiahrt went from trailing by double digits to losing by only 4.9%, so I guess Sarah still gave him a big boost.
But what I don't like about this and other similar stories about these endorsements is that they don't tell us if there were any significant policy differences between the candidates. Were these two about the same on major issues? Amnesty, cap and trade, energy policy, and other issues. They don't tell us, and that would be worth knowing for those of us several states away from some of these contests.
SurveyUSA was polling the race the day Sarah announced her endorsement June 24. That poll was 53-33 Moran.