new york u.s. republican representative darrell issa california join climate solutions caucus bipartisan group lawmakers dedicate fight climate change spokesmen group issa say wednesday group found year ago florida lawmakers look slow effect global warm like coastal flood 13 republicans 13 democrats commit keep even number members party group hop become counter-balance president donald trump new administration include several doubters science climate change place democrats republicans work together problem really difficult solve say daniel richter caucus spokesman legislative director citizens climate lobby non-profit whose volunteer encourage members congress join caucus republicans accept idea human activity cause global temperatures rise conclusion reach overwhelm majority scientists others accuse democrats overly politicize scientific issue attempt demonize opponents trump republican express skepticism climate change speculate campaign global warm hoax concern money-making industry richter say hop caucus one day powerful house freedom caucus group republicans whose vote en bloc become strong force conservative activism scuttle new legislation members ideologically oppose say congress strongly weight favor republicans caucus need least dozen republican members become significant force republican issa join bipartisan house caucus climate change