paris french far-left opposition party leader jean-luc melenchon draw tens thousands rally saturday president emmanuel macron labor reform aim reinforce credentials macron strong political opponent trade union protest macron plan make hire fire easy give company power work condition seem lose steam melenchon say france unbowed party call unions join together keep fight battle start melenchon tell crowd gather place de la republique rally melenchon call social coup etat end warn macron say bow street pressure melenchon say street defeat kings street defeat nazis crowd chant resistance resistance remain see whether melenchon party capacity mobilize kind street resistance force last two presidents dilute attempt loosen labor code melenchon tweet 150,000 demonstrators turn police put number 30,000. campaign rally march weeks presidential election draw 130,000 people party officials say today send extraordinary strong message workers alone melenchon add macron campaign presidency someone could bridge divide leave right since election already alienate many especially leave say would jupiter-like president fray avow determination tolerate slackers saturday protesters carry banners read slackers streets macron president wealthy party officials say 150 bus bring protesters france brigitte gerard 59-year-old school teacher rennes western france carry banner read watch jupiter people rumble lot anger say march set place de la republique think aware cut reality arm-wrestling contest new labor rule discuss length advance unions among measure cap payouts dismissals judge unfair emmanuel macron start arm-wrestling contest french people ... think stop decree france unbowed lawmaker adrien quatennens tell reuters string opinion poll show far-left maverick melenchon strong opponent macron upstart en marche move party highlight weakness traditional mainstream party socialists rule 2012 2017 tatters conservative republicans divide whether back macron far-right national front whose leader marine le pen reach second round run-off macron weaken internal fight ironically melenchon strength could good thing macron poll also indicate see credible alternative rather conduit protest odoxa survey carry week 66 percent respondents say melenchon would bad president centrist president formally sign labor decree friday due enter force start next year measure first step series reform also amend unemployment benefit pension systems change could well provoke protest change labor code france 's far-left leader urge french 'resistance macron