Before the 1977 election the party merged into Union of the Democratic Centre.

In May 2009 the party joined the Union of the Centre.

Now she belongs the Union of the Centre.

The Union of the Democratic Centre and Euskadiko Ezkerra won 6 seats each.

This election saw the Union of the Democratic Centre, the party that had shepherded the country through its transition to democracy, nearly wiped out.

While Cuffaro was undergoing his appeals trial, the Union of the Centre nominated him in the 2008 general election and he was re-elected senator.

In 2012 the Union of the Democratic Centre was reconstructed.

His career in politics began on 24 February 1978, when he became part of the Union of the Democratic Centre (Spain).

Union of the Centre may refer to:

In 2010 he was re-elected to the Council for the Union of the Centre.