The conspiracy trials that led to the conviction of two of the country's most dynamic politicians, Awolowo and Enahoro, severely weakened public confidence in the political and judicial systems. Abuses were widespread, including intimidation of opponents by threats of criminal investigation, manipulation of the constitution and the courts, diversion of public funds to party and private use, rigging of elections, and corruption of public officials whose political patrons expected them to put party interests ahead of their legal responsibilities. Popular disillusion also intensified because politicians failed to produce benefits commensurate with constituents' expectations.

The volatile political scene leading up to elections in 1964 was ominous. The Action Group virtually disappeared from the federal parliament as a result of the Awolowo affair, thereby fundamentally altering political alignments at the national level. By early 1964, therefore, the federal parliament no longer had a recognized opposition. Akintola's party, which was renamed the Nigerian National Democratic Party in an effort to attract more support, now dominated the Western Region. The federal government nominally consisted of a consensus of the ruling parties of all four regions, but it was a fragile alliance at best and had emerged as a result of heavy-handed tactics. The NCNC had strengthened its position by gaining firm control of the Midwestern Region, so that it dominated two of the four regions. Akintola managed to undermine the NCNC in the Western Region, even though nationally he was pledged to an alliance with the NCNC. For its part, the NCNC denounced Akintola's party as a "tool of the NPC" and allied itself with remnants of the Action Group.

Political realignment was deceptive, however, because the basic divisions within the country remained unaltered. The NPC was reasonably secure in the Northern Region, despite the presence of minor parties, but it could not govern Nigeria alone, and alliances with any of the southern parties were ideologically incompatible and very tenuous. The NPC continued its dominance because of the inability of the other parties to find common ground among themselves and with northern progressives. Awolowo's pointed remarks in 1963 that democracy could be secured only if the Action Group and the NCNC could reach an accommodation that would remove the deadweight of the NPC from power fueled NPC concerns. The detention of Awolowo prevented that alliance from maturing, but it did not result in greater political stability. Indeed the alliance between the NPC and NCNC, which had dominated federal politics and destroyed the Action Group, now fell apart.

Data as of June 1991