The Hungarian Liberal Party (MLP) was the only political party to openly campaign in favour of the compulsory quota system and asked its supporters to vote "yes" in the October 2016 migrant quota referendum. The MLP's foreign policy advisor István Szent-Iványi said in August 2016 that the support of "yes" votes "is the only way to stand up for European values, Hungary’s belonging to Europe and European solidarity", criticizing the behaviour of left-wing parties, which decided to boycott the referendum. Hungarian Liberal Party chairman Gábor Fodor (currently the party’s only MP) submitted a bill in 2017 calling for the legalization and regulation of cannabis in Hungary. In economic terms, the party supports flat tax.