The National Assembly and the senate are this week expected to hold special sittings to debate among other issues, the building bridges initiative report. This debate comes amid heated debate over whether to reopen the document for amendment before subjecting it to a referendum. On this week's house of cards, KTN senior political reporter Murimi Mwangi highlights key hurdles to the BBI process and seeks to explain why pressure mounts on initiative co-principals, president Uhuru Kenyatta and ODM leader Raila Odinga to resolve the squabbling that now threatens to derail the process.