Here are a few options for a formal equivalent, depending on your preferred focus:

• Political Turbulence and Partisanship: A Historical Perspective
• Echoes of the Past: Assessing Contemporary Political Polarization and Misinformation
• Historical Precedents for Current Political Instability and Partisan Conflict

Recommendation: The first option, “Political Turbulence and Partisanship: A Historical Perspective,” is the most concise and professional.

Here is a formal rewrite of the title:

Mayor Khan Launches £7 Million Campaign to Combat Online Disinformation

Here are a few options for a formal revision, depending on where the title will be used:

• Most direct: “Implementation of Restrictions on Social Media Usage Among Minors in Ohio”
• Most concise: “Ohio Enacts New Restrictions on Social Media Access for Minors”
• Most professional: “Restoration of Social Media Usage Regulations for Minors in Ohio”

Recommendation: If this is for a report or formal document, “Implementation of Restrictions on Social Media Usage Among Minors in Ohio” is the most professional choice.