santiago chilean president michelle bachelet top economic officials resign thursday cancellation major mine project weaken center-left coalition november elections finance minister rodrigo valdes say news conference members bachelet government share sense urgency spur growth attract investment world top copper producer able make everybody share conviction valdes say point need discipline clear rule private sector valdes hold position two years criticize government decision reject 2.5 billion copper iron project own andes iron last week environmental ground economy minister luis felipe cespedes finance undersecretary alejandro micco also step nl2n1l70zt cespedes talk reporters respond ask quit micco office decline comment reason resign dominga project know become symbol recent months increase difficulties business remain one latin america open economies lay bare philosophical differences within government bachelet say valdes replace nicolas eyzaguirre economist charge legislative affairs president cespedes replace jorge rodriguez president banco del estado de chile think development something do back people number matter happen families say bachelet shakeup see blow center-left presidential candidate alejandro guillier generally supportive bachelet boost conservative frontrunner sebastian pinera correct solution change cabinet change government pinera tell journalists chilean peso strengthen percent valdes resignation traders bet shake-up make pinera win likely make tough current government push social security reform thing divide center-left even say kenneth bunker head elections unit universidad central de chile eyzaguirre rodriguez centrists serve ricardo lagos moderate president 2000 2006. growth slow recently chile long investor darling latin america rich nation july downgrade debt first time since 1990s bachelet face criticism government poorly organize lack unity approval rat rise slowly recent months series legislative win remain low 30s chilean economic officials resign blow center-left coalition