The latest opinion polls indicate that the National Super Alliance is the most preferred party in Nairobi followed by Jubilee.
The poll further reveals that if elections were to be held today, Senator Mike Sonko and Governor Evans Kidero would tie for the city's top job.
The study was carried out by trends and Insights for Africa (TIFA) between July 1 and 2 indicates that eight out of seventeen constituencies are NASA strongholds, six Jubilee's strongholds and three others being hotly contested.
Ruaraka, Kibra, Embakasi South, Dagoreti North, Embakasi Central, Langata, Mathare and Embakasi East constituencies have all been branded NASA strong holds.
Starehe, Dagoreti South, Roysambu, Kamukunji, Embakasi North and Kasarani are said to be leaning towards Jubilee, while Westlands, Makadara and Embakasi West are hotly contested by both parties.
“The support for NASA has gradually increased since July 2016 and it is strongest now compared to Jubilee's support which has also been on the rise but has recently dropped," said Maggie Ireri, TIFA director.
According to the poll, NASA's support has gone up from 38 percent in July 2016 to 47 percent in February 2017 and now stands at 56 percent as of July 2017.
Jubilee's support went up from 38 percent in July 2016 to 42 percent in February 2017 but then dropped to 35 percent as of July this year.