madrid spanish prime minister mariano rajoy struggle secure support across traditional political divide battle stop catalonia break away lack consensus could compound spain bad political crisis decades rajoy mull unprecedented step invoke constitution dissolve catalan parliament trigger regional elections rule party lawmakers say catalonia hold independence vote sunday despite violent attempt stop sack catalan government know madrid nuclear option give consider likely foment unrest barcelona rest heavily industrialize affluent region account fifth spain economy however rajoy people party pp govern minority play trump card talk main opposition party socialists seek explicit support move lead pp lawmaker say article 155 1978 constitution never use country fascist dictatorship live memory conservative pp see catalans historically connect era late dictator francisco franco experts say rajoy must socialists also strong unionists board 155 need wide-ranging back know whether resolve problems back one party congress difficult obtain back majority catalans say rafael hernando serve parliamentary organizer pp without back rajoy hand could weaken accord political source analysts might ultimately call snap national election win mandate take catalan separatists prime minister office decline comment participants referendum opt overwhelmingly independence turnout 43 percent give catalans favor remain part spain mainly boycott ballot socialists open article 155 option referendum appear shift position week police use batons rubber bullets stop catalans vote scenes draw international condemnation instead say week would move parliamentary motion criticize rajoy deputy soraya saenz de santamaria blame police violence sunday motion symbolic reprimand oblige minister step influential members party former socialist deputy prime minister alfonso guerra want rajoy take hard line catalan separatism socialists vote favor article 155 guerra say tuesday party add reprimand catalan leader carles puigdemont saenz de santamaria invoke article 155 need approval spain senate pp control majority political support bold step low house would help protect rajoy no-confidence motion political opponents left-wing podemos party oppose use article want rajoy negotiate new referendum independence time bless madrid ban last sunday referendum unconstitutional deploy police disrupt even ally regard political mistake basque national party form campaign great autonomy northern basque region also sack catalan government last week withdraw support rajoy 2018 budget catalan question resolve antonio barroso deputy director london-based research firm teneo intelligence say socialists position use article 155 could critical rajoy future basically take country uncharted water want maximum support many party get board also wide acceptance course action government pursue barroso say rajoy offer open multi-party talk could cut good tax constitutional deal catalonia return region give independence sunday violence harden many catalans compromise far center-right ciudadanos say week favor sack catalan government dissolve parliament hold regional elections reflect struggle find broad support rajoy postpone least next week expect parliamentary debate catalonia though might late member catalonia pro-independence popular unity candidacy party member region govern coalition say wednesday catalonia would move regional parliament monday declare independence spanish pm seek safety number play catalonia trump card