Monday marked a tipping point in international support for Nicolas Maduro’s embattled government in Venezuela. After Maduro failed to meet an ultimatum to hold new elections, major European nations, including Britain, Germany, France, and Spain, joined the U.S. in recognizing self-declared interim President Juan Guaido as the country’s legitimate leader. If the growing bloc of Guaido allies want to be successful, however, they must exercise diplomatic unity.

So far, Maduro’s increasing international isolation hasn’t yet changed his domestic stranglehold on power.