Going out on a limb here, but Foxx statement reported in three tweets by Brad Broders @news14Broders seems to suggest he is considering it.

Mayor Foxx: “(Perdue’s) decision not to run for re-election came as a surprise.  I remain focused on Charlotte and substantial work ahead …

Mayor Foxx statement: “I will spend the coming weeks talking with my family and friends about how I could best serve our city and state….

Mayor Foxx statement cont’d: “…and I ask the public and media for some patience as I work through those conversations
Hmmmmmm …