In the
1978 trade union elections SU raised the slogan
"Un frente común por el pan, el trabajo y la libertad" ('A common front for bread, work and freedom'). SU won 3,376 delegate seats across Spain (2.7% of the seats elected). SU emerged as a major force in
Navarre in the polls. In Navarre, the majority that had been active in
Comisiones Obreras had left to build SU. According to the official count, SU had won 269 delegates out of a total of 2,614 (becoming the largest trade union in the fray). However a count made by
Diario de Navarra presented different numbers, putting SU at 432 seats (15.23%, just behind CC.OO.). SU also obtained high numbers of delegates in
Huelva province, where it won 248 delegates (23.4%). SU won the election at the conservative newspaper
ABC in Madrid. At the Barajas printing centre, SU won 7 out of the 13 committee seats. At the calle Serrano editorial and administrative office, SU won 7 out of 22 seats. ==Second Congress==