(/ˈmɪd lɪŋ/)

1. Of intermediate or average size, position, or quality; mediocre

…In a retrospective mood, staffers said that, as Obama told me, Clinton would have been an “excellent” President, but they also voiced some dismay with her campaign: dismay that she had seemed to stump so listlessly, if at all, in the Rust Belt; dismay that the Clinton family’s undeniable taste for money could not be erased by good works; dismay that she was such a middling retail politician.

From the post: After Trump’s victory, Obama reflects on his legacy
Source: Obama Reckons with a Trump Presidency (newyorker.com)