Ruto, Raila fire up battle for 4m swing votes
The duo has ramped up campaigns in at least 11 battleground counties.
Session will also seek to craft a presidential election winning formula in August polls.
DP's formation faces threats of implosion, accused of bullying days to the polls.
Says his administration will provide affordable healthcare and introduce the social protection programme
Obure is the Jubilee candidate for the Kisii governor seat.
Bosire, Nyaribo and Nyambati are seen as front-runners.