washington president donald trump say tuesday likely sign order week expect allow americans buy stripped-down health insurance policies step experts say would undermine obamacare law trump oppose unable win passage legislation dismantle 2010 law congress lead party trump indicate would take unilateral action offer specifics beyond say action would let people cross state line obtain great competitive healthcare cost unite state nothing expect order would allow small businesses individuals band together associations buy health insurance plan would exempt obamacare requirements include mandatory coverage 10 essential health benefit maternity newborn care prescription drug mental health treatment would also expand amount time people use short-term medical insurance plan cheap traditional plan cover limit set benefit people could use plan year compare three months current law also sign something probably week go go long way take care many people badly hurt healthcare trump tell reporters oval office congress way decide take upon trump add say plan largely work out white house spokeswoman sarah sanders say trump make announcement end friday trump say action would let insurers sell across state line association health plan instance could sell state few benefit requirements insurance policies could cheap provide full range medical coverage require obamacare potentially make attractive people state unclear plan would become available unlikely consumers could sign plan 2018 open enrollment period begin nov. 1. experts question trump authority issue order would exempt plan others obamacare rule rather pursue change legislation action could open trump legal challenge democratic state attorneys general say sue trump try destroy obamacare plan allow order could lure young healthy people away individual insurance market create 2010 affordable care act dub obamacare could destabilize market insurers already exit market altogether par back offer hike premiums uncertainty cause trump administration experts say trump plan could leave behind sick people obamacare market raise premiums effectively erode law protection people pre-existing medical condition charge general belief every turn federal government go create regulations hurt rather help market say craig garthwaite director healthcare program northwestern university kellogg school management refer trump administration unwind ability people pre-existing condition get insurance aca garthwaite say republicans fail make good seven-year promise repeal replace obamacare signature domestic policy achievement trump democratic predecessor barack obama gutting obamacare top trump campaign promise trump call law failure vow let implode undermine obamacare regulatory administrative action last week u.s. department health human service issue rule let businesses non-profit organizations lodge religious moral objections obtain exemption law mandate employers provide birth control women health insurance co-payment trump decline commit make payments guarantee insurers obamacare payments estimate billion year help low out-of-pocket medical cost low-income consumers insurers cite uncertainty exit insurance market hike premiums administration slash obamacare advertise budget halve open enrollment period cut fund group help sign people insurance law trump say 's likely sign healthcare order week