Lal Krishna Advani (born 8 November 1927) known as L. K. Advani is an Indian politician who served as the 7th Deputy Prime Minister of India from 2002 to 2004 under Atal Bihari Vajpayee. Advani also served as Minister of Home Affairs in the BJP-led National Democratic Alliance government from 1998 to 2004. He is one of the co-founder and senior leader of Bharatiya Janata Party. He was the Leader of the Opposition in the 10th Lok Sabha and 14th Lok Sabha.

Atal Bihari Vajpayee was appointed the first president of the new party. Historian Ramachandra Guha writes that despite the factional wars within the Janata government, its period in power had seen a rise in support for the RSS, marked by a wave of communal violence in the early 1980s. Despite this, the BJP under Vajpayee initially took a more moderate approach to Hindutva, to gain a wider appeal. This strategy was unsuccessful, as the BJP won only two Lok Sabha seats in the elections of 1984. A few months prior to the election, Indira Gandhi was assassinated, creating a sympathy wave for the Congress that also contributed to the BJP's low tally, as the Congress won a record number of seats. This failure led to a shift in the party's stance; Advani was appointed party president, and the BJP returned to the hardline Hindutva of its predecessor.  Under Advani, the BJP became the political face of the Ram Janmabhoomi campaign. In the early 1980s, the Vishwa Hindu Parishad (VHP) had begun a movement for the construction of a temple dedicated to the Hindu deity Rama at the site of the Babri Masjid in Ayodhya. The agitation was on the basis of the belief that the site was the birthplace of Rama, and that a temple once stood there that had been demolished by the Mughal emperor Babur when he constructed the Babri mosque. The Archaeological Survey of India (ASI) has supported the claim that a Hindu structure once stood at the site, without commenting on a possible demolition. The BJP threw its support behind this campaign, and made it a part of their election manifesto, which provided rich dividends in the general elections of 1989. Despite the Congress winning a plurality in the election, it declined to form a government, and so the National Front government of VP Singh was sworn in. The support of the BJP, with its tally of 86 seats, was crucial to the new government.  Advani embarked on a "Rath Yatra," or chariot journey, to mobilise karsevaks, or volunteers, to converge upon the Babri Masjid to offer prayers. This Rath Yatra, undertaken in an air-conditioned van decorated to look like a chariot, began from Somnath in Gujarat and covered a large portion of Northern India until it was stopped by the Chief Minister of Bihar, Laloo Prasad Yadav, on the grounds that it was leading to communal violence. In the 1991 general elections, the BJP won the second largest number of seats, after the Congress.  In 1992, two years after Advani ended his yatra, despite assurances given by the Kalyan Singh led BJP Government to the Supreme Court, the Babri Masjid was demolished by the communal forces alleged complicity of the Kalyan Singh government. Advani is one of the main accused in the Babri Masjid case.Answer this question using a quote from the following article:

Why did they decide against forming a government?
so the National Front government of VP Singh was sworn in. The support of the BJP, with its tally of 86 seats, was crucial to the new government.