On 15 June 2007, the lower house of the Congress of Colombia approved a historic same-sex union bill by a vote of 62-43, and President Álvaro Uribe was expected to sign the measure, which had been approved by the Colombian Senate in April. However, on 19 June, a group of conservative senators broke party discipline in what is usually a routine vote on the final form of a bill and defeated the measure by 34-29 in the 102-member Senate. About 80 LGBT rights advocates held a demonstration outside Congress the following day, protesting the bill's defeat. Supporters vowed to revive the legislation.