PARIS (Reuters) - French President Emmanuel Macron has expressed his support for Spain s constitutional unity in a telephone conversation with Prime Minister Mariano Rajoy, a source in the president s office said on Monday.  Hundreds were injured on Sunday when police tried to disrupt a referendum on Catalonian independence that Madrid has deemed illegal.  The president underlined his support for Spain s constitutional unity,  the source said. The source made no reference to the tactics used by Spanish police. 