Nasa chief campaigner Musalia Mudavadi has called upon constructive dialogue.
The Amani National Congress leader made the sentiments after Nasa's summit held on Monday.
The summitt was convened after leader Raila Odinga joined forces with President Uhuru Kenyatta.
The Nasa Co-principals stated that they had not been informed about this decision.
"Let it be known that we support constructive dialogue to deal with problems ... devolution, inclusivity, poverty, attacks on the judiciary among others ... "Mudavadi told the reporters that he could not divulge much information as time is needed to delve more into what the discussed.
"Due to the weighty matters, we shall give a 'small' briefing and will not take any questions for issues at hand are extremely weighty," he said.
Mr Mudavadi also stated that all affiliate parties will be update in regards to the move made.
"The summit registers its appreciation for constructive dialogue and a framework to be take in issues of national concern. We will proceed to brief the organs of the constituent parties," he said.
Musalia added that a more clear address will be issued once all the parties give their input.