The phrase "leadership vacuum" refers to a situation where there is a lack of strong or capable leaders. It means that there is no one effectively guiding or leading a group, organization, or country. Full definition
In the subsequent leadership vacuum, in - fighting broke out between different offices and specialties. (canadianbusiness.com)
With real talent in dwindling supply, clients getting angrier about legal fees, and a law firm leadership vacuum in the offing, this approach strikes me as more than slightly insane. (slaw.ca)
The narrative that China is poised to fill the global leadership vacuum left by the US has grown stronger since Xi's Davos debut. (qz.com)