Spain's incumbent socialist government was "irresponsible" to negotiate with Catalonia's pro-independence parties, the president and leader of Spain's opposition People's Party (Partido Popular) told CNBC.
"This (socialist) government has tried to negotiate with those that want to divide our own nation," Pablo Casado told CNBC's Willem Marx in Madrid Thursday.
Casado said that Prime Minister Pedro Sanchez had been "irresponsible" to accept the support from secessionist parties that wanted to "break the unity of Spain" and that a PP-led government, should the party win a forthcoming general election, would not allow Spain to be divided.
"What we want to do if we win the election in April is to make clear that in Spain, as in all the modern democratic countries in the world, we are going to make sure everyone accomplishes with (the use of) law," he said.
Casado's criticism of the government comes as Spain's main political parties have swung into campaign mode ahead of a snap election in late April. The vote comes after lawmakers in Europe's fourth largest economy failed to agree on a draft budget plan last week.