25 out of 28 incumbent governors on the ballot this week won reelection

Vox reports:

An analysis by Louis Jacobson of Governing found an 82 percent win rate for US governors who sought a second term between 1998 and 2010, so this success isn't anything unusual.

But since the crop of incumbents up this year was overwhelmingly Republican, this is great news for the GOP. It indicates nearly every winner brought to power during the Tea Party wave of 2010 managed to govern his or her state effectively enough to win another term. And it ensures that the party will have a deep bench of two-term governors who could be future presidential and vice presidential prospects.

Yet, polls have shown that voters are upset with politicians.