The Spanish Socialist Workers' Party (PSOE) under incumbent President Jaime Blanco went on to win its first and only regional election in Cantabria.

The Regionalist Party of Cantabria (PRC) suffered from the UPCA's surge and returned to its 1983 results, while the Democratic and Social Centre did not reach the required 5% threshold and was expelled from parliament.

[1] Voting for the Parliament was on the basis of universal suffrage, which comprised all nationals over 18 years of age, registered in Cantabria and in full enjoyment of their political rights.

Hormaechea, who had been Mayor of Santander between 1974 and 1987 and stood as an independent within AP, was elected as President of Cantabria thanks to the abstention vote of the CDS two deputies.

[13] Hormaechea was also accused of political misconduct, such as extorting other deputies in exchange of their votes,[14] bribing MPs from other parties,[15] as well as influence peddling favoring family members[16] and physically attacking a PSOE senator.

[18] From that point, the deteriorating relationship between the PP and Hormaechea as a result of the latter's personalism and marginalization of the party's structure in the region triggered a political crisis.

[19][20] Hormaechea's insults to party leaders in late 1990[21] motivated the PP's decision not to choose him as candidate for the incoming 1991 election,[22] as well as the party presenting a motion of censure on Hormaechea to remove him from the regional government,[23] with the support from the PSOE, PRC and CDS, electing PSOE leader Jaime Blanco as the head of a coalition administration for the remainder of the legislature.

[28] The Spanish Socialist Workers' Party (PSOE) tried to benefit from the split in the centre-right vote, with former Deputy Prime Minister Alfonso Guerra asking conservative voters to vote the PSOE "for this time", reminding the chaotic political situation of the community as a result of the infighting between former President Juan Hormaechea and the People's Party leadership.