US mayors push for building bridges with Mexico instead of walls Mayors from cities around the United States, at a gathering of C40 mayors in Mexico City on Friday, say that they believe they can "build bridges" with Mexico, in response to US president elect Donald Trump’s promise to construct a wall at the border. Also at the summit, Paris mayor Anne Hidalgo reaffirmed her commitment to ban diesel vehicles in the French capital by 2025. IMAGES AND SOUNDBITES