u.s. supreme court monday hear arguments challenge 26 state president barack obama executive action defer deportation certain immigrant children parent country illegally chronology case unite state v. texas june 15 2012 obama administration department homeland security initiate defer action childhood arrivals daca program suspend deportation two years people enter country illegally least five years early age 16 age 31 june 15 2012. nov. 20 2014 obama unilateral executive action initiate new deferred-deportation work-authorization policy immigrants whose children u.s. citizens lawful permanent residents live illegally unite state since jan. 2010. people must pass certain background check possible past criminal convictions program call defer action parent americans lawful permanent residents dapa obama administration also expand early daca program eliminate age-31 cap increase defer deportation two three years dec. 2014 texas republican-governed state sue democratic obama administration u.s. district court texas assert obama nov. 20 executive action bypass republican-led congress violate administrative procedure act apa notice-and-comment requirements new federal agency rule violate u.s. constitution dictate president take care laws faithfully execute 26 50 u.s. state eventually sign lawsuit alabama arizona arkansas florida georgia idaho indiana kansas louisiana maine michigan mississippi montana nebraska nevada north carolina north dakota ohio oklahoma south carolina south dakota tennessee texas utah west virginia wisconsin feb. 16 2015 u.s. district court judge andrew hanen border city brownsville texas issue injunction block enforcement program nationwide judge say obama administration fail offer notice seek comment administrative procedure act administration lawyers counter action arise official rule-making rather homeland security department discretion deportation priorities may 26 2015 administration appeal judge decision u.s. court appeal 5th circuit base new orleans uphold hanen injunction pending appeal merit case nov. 2015 u.s. court appeal 5th circuit rule texas state throw obama dapa expand daca action court say subject notice-and-comment requirements administrative procedure act jan. 19 2016 supreme court agree hear administration appeal justices say review administrative procedure act issue well whether program violate take care mandate key question justices whether texas state even legal stand bring case base claim obama action would cost state financially certain public service cost issue driver license illegal immigrants feb. 13 2016 justice antonin scalia die leave supreme court eight members four liberals four conservatives possibility 4-4 deadlock split rule would defeat obama would leave place 5th circuit decision disallow executive action april 18 2016 supreme court hear oral arguments case unite state v. texas justices seem divide along ideological ground liberal justices sound supportive obama action conservatives sound skeptical underscore possibility 4-4 split rule expect end june milestones supreme court immigration case