u.s. senator bob corker spend much past two months public war word president donald trump something highly unusual member congress white house occupant political party follow facts republican senator tennessee corker 65 elect senate 2006 leave early 2019. corker criticism trump increase since announce would seek third term next year clash include trump reaction white supremacist rally august many view equivocal corker build fortune successful construction firm owner enter politics mayor chattanooga first senate campaign mark republican national committee advertisement criticize racial politick african-american opponent harold ford corker ask rnc take spot senate corker know fiscal conservative reputation work democrats craft deal areas immigration debt reduction independent streak outspoken personality make popular guest talk show corker become chairman senate foreign relations committee 2015 become lead national security voice trump shortlist secretary state selection exxon mobil executive rex tillerson corker frequently consult corker face harsh criticism far-right echo trump tweet legislation give congress right review 2015 iran nuclear pact go effect trump charge corker responsible deal widely reject false give corker one lead critics corker also member budget bank age committees factbox retire republican corker embroil public fight trump