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 The National Front system itself eventually began to be seen as a form of political repression by dissidents and even many mainstream voters, especially after what was apparently later confirmed as the supposedly fraudulent election of [[Misael Pastrana Borrero]] in [[1970]], which resulted in the defeat of the relatively populist candidate [[Gustavo Rojas  Pinilla]]. The [[M-19]] guerrilla movement, "Movimiento 19 de Abril" (19th of April Movement), would eventually be founded in part as a response to this particular event.
 
Although the system established by the Sitges agreement was phased out by [[1978]], the [[1886]] Colombian constitution--in effect until [[1991]]--required that the losing political party be given adequate and equitable participation in the government which, according to many observers and later analysis, eventually resulted in some increase in corruption and legal relaxation. The current 1991 constitution does not have that requirement, but subsequent administrations have tended to include members of opposition parties.
 
 ==Post-National Front years==
 
 <eod> <sod> 
 The National Front system itself eventually began to be seen as a form of political repression by dissidents and even many mainstream voters, especially after what was apparently later confirmed as the supposedly fraudulent election of [[Misael Pastrana Borrero]] in [[1970]], which resulted in the defeat of the relatively populist candidate [[Gustavo Rojas  Pinilla]]. The [[M-19]] guerrilla movement, "Movimiento 19 de Abril" (19th of April Movement), would eventually be founded in part as a response to this particular event.
 
Although the system established by the Sitges agreement was phased out by [[1974]], the [[1886]] Colombian constitution--in effect until [[1991]]--required that the losing political party be given adequate and equitable participation in the government which, according to many observers and later analysis, eventually resulted in some increase in corruption and legal relaxation. The current 1991 constitution does not have that requirement, but subsequent administrations have tended to include members of opposition parties.
 
 ==Post-National Front years==
 
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