In November 2003, Dmitry Kozak, a counselor of Russian president Vladimir Putin, proposed a memorandum on the creation of an asymmetric federal Moldovan state, with Moldova holding a majority and Transnistria being a minority part of the federation. Known as "the Kozak memorandum", it did not coincide with the Transnistrian position, which sought equal status between Transnistria and Moldova, but gave Transnistria veto powers over future constitutional changes; this encouraged Transnistria to sign it. Moldovan President Vladimir Voronin was initially supportive of the plan, but refused to sign it after internal opposition and international pressure from the OSCE and US, and after Russia had endorsed the Transnistrian demand to maintain a Russian military presence for the next 20 years as a guarantee for the intended federation.