GMB vs GEJ: Which State Preferred Which In 2011 & 2015?

Muhammadu Buhari of the opposition APC party has won the Nigeria’s presidential election on Tuesday, defeating the long-ruling PDP and the incumbent President Goodluck Jonathan. In a historic tight race, Buhari gained 15.4 million votes against Jonathan’s 12.8 million.
Earlier,
Though the APC’s voter base is in the north, the party enjoys support all over the country, unlike the opposition in 2011. It was expected that majority northern Muslims support Buhari, while many southern Christians support Jonathan. But Buhari took Lagos state in the south as well as crucial wins in three northern states.
Notably, many states that supported the PDP’s Jonathan in 2011 presidential election have opted for the APC’s Buhari in 2015.
Lagos state gave 1,281,688 votes to Jonathan in 2011 and was expected to support the PDP candidate again in 2015. This prognosis, however, was incorrect: Jonathan gained only 632,327 votes in Lagos of 2015.
In 2011, Plateau state chose Jonathan (1,029,865); in 2015, votes were split almost equally between Jonathan and Buhari. Still, Jonathan’s share of vote was somewhat higher – 549,615 votes.
Both in 2011 and 2015, Goodluck Jonathan was largely supported in Abia and Anambra states. In 2011, Abia gave Jonathan 1,175,954 votes (as opposed to Buhari’s 3,608), Anambra – 1,145,169 votes (as opposed to Buhari’s 4,223). In 2015, Jonathan gathered 368,303 valid votes in Abia (as opposed to Buhari’s 13,394), and 660,762 votes in Anambra (as opposed to Buhari’s 17, 926).
Bauchi state changed its preference from Buhari in 2011 to Jonathan in 2015: close to one million voters, who chose Buhari in the 2011 election, supported Jonathan this time.
On the contrary, Adamawa, Ogun and Kogi states, once “Jonathan-positive” in 2011, noticeably shifted their focus to Buhari.
GMB vs GEJ: State-by-state ‘preference’ of the APC or PDP candidate after the presidential election in 2015:
GMB vs GEJ: Which State Preferred Which In 2011 & 2015?