new york u.s. president-elect donald trump wednesday endorse niece former critic mitt romney next chair republican national committee move put stamp party leadership rnc name michigan republican party chair ronna romney mcdaniel deputy chair trump say look forward take party leadership trump incoming white house chief staff reince priebus leave rnc chairmanship trump take office jan. 20 excite highly effective leader ronna mcdaniel rnc deputy chair look forward serve party chairman 2017 trump say statement ronna extremely loyal movement efforts critical tremendous victory michigan know bring passion republican national committee add rnc 168 elect members convene january elect next chairman trump endorsement mcdaniel likely carry enough weight get elect mcdaniel profile rise trump view help win michigan nov. election state vote republican presidential election since 1988 critical trump victory democrat hillary clinton selection come two days trump pass mitt romney secretary state instead choose exxon mobil corp chief executive rex tillerson trump romney get past frictions republican presidential nominate battle 2012 republican nominee critical trump candidacy bob paduchik veteran republican operative ohio trump campaign manager state name deputy co-chair rnc trump victory ohio also crucial victory trump endorse romney niece ronna romney mcdaniel rnc chair