I had posted a "United States" filter earlier this week. Carolyn Holmes from Lister Hill Library sent me a much more complete filter and has given me permission to post it here. Thanks, Carolyn!
United States [mh] OR “united states” OR usa OR
u.s.a. OR Appalachia* OR “great lakes” OR mid-atlantic-state* OR
mid-atlantic-region* OR middle-atlantic-state* OR middle-atlantic-region* OR
midwestern-us* OR midwestern-u.s* OR Midwestern-state* OR Midwest-state* OR
Midwest-us* OR Midwest-u.s* OR “great plains” OR heartland OR “new england” OR
northeastern-us* OR northeastern-u.s* OR northeastern-state* OR
northeast-state* OR northeast-us* OR northeast-u.s* OR “pacific northwest” OR
northwestern-us* OR northwestern-u.s* OR northwest-u.s* OR northwest-us* OR
northwestern-state* OR northwest-state* OR pacific-state* OR southeast-state*
OR southeastern-state* OR southeast-region OR southeastern-region OR
southeast-us* OR southeastern-us* OR southeast-u.s* OR southeastern-u.s* OR
southern-state* OR southern-us* OR southern-u.s* OR southwest-state* OR
southwestern-state* OR southwest-us* OR southwestern-us* OR southwest-u.s* OR
southwestern-u.s* OR “deep south” OR “black belt” OR “rust belt” OR “district
of Columbia” OR “Washington dc” OR Washington-d.c. OR Alabama OR (Birmingham
[ad] AND al [ad]) OR Huntsville [ad] OR (Montgomery [ad] AND al [ad])OR Alaska
OR anchorage [ad] OR fairbanks [ad] OR Arizona OR Phoenix [ad] OR Tuscon [ad]
OR Flagstaff [ad] OR Arkansas OR “little rock” OR California OR “los angeles”
OR “san diego” OR “san Francisco” OR Berkeley [ad] OR Stanford [ad] OR Colorado
OR Vail [ad] OR Denver [ad] OR Connecticut OR Farmington [ad] OR “new haven”
[ad] OR Hartford [ad] OR Delaware OR Wilmington [ad] OR Newark [ad] OR Florida
OR Miami [ad] OR Gainesville OR Jacksonville OR Tampa OR Tallahassee OR Georgia
OR Atlanta OR (Athens [ad] AND ga [ad]) OR (Augusta [ad] AND ga [ad]) OR Hawaii
OR Hawai'i OR Honolulu OR Idaho OR Boise [ad] OR Illinois OR Chicago OR Urbana
[ad] OR Evanston [ad] OR Indiana OR Indianapolis OR "West Lafayette"
OR Iowa OR Kansas OR Wichita OR Kentucky OR Lexington [ad] OR Louisville [ad]
OR Bardstown [ad] OR Louisiana OR “new Orleans” OR “baton rouge” OR Shreveport
OR Maine OR Orono OR (Scarborough [ad] AND me [ad]) OR Maryland OR Bethesda
[ad] OR Baltimore [ad] OR Rockville [ad] OR “johns Hopkins” OR Massachusetts OR
Boston OR Harvard OR (worcester [ad] AND ma [ad]) OR Burlington [ad] OR
Michigan OR Detroit OR “ann arbor” OR “east lansing” OR Minnesota OR
Minneapolis OR Rochester OR “st paul” [ad] OR “saint paul” [ad] OR Mississippi
OR (Jackson [ad] AND ms [ad]) OR Missouri OR (Columbia [ad] AND mo [ad]) OR
Montana OR Bozeman [ad] OR Missoula OR Nebraska OR Omaha [ad] OR Lincoln [ad] OR
Nevada OR “Las Vegas” OR “New Hampshire” OR “New Jersey” OR “New Mexico” OR
“New York” OR “North Carolina” OR “North Dakota” OR Ohio OR Columbus [ad] OR
Cleveland [ad] OR Cincinnati OR Oklahoma OR Oregon OR Portland [ad] OR
Pennsylvania OR Philadelphia OR Hershey [ad] OR “Rhode Island” OR providence
[ad] OR “South Carolina” OR “South Dakota” OR Tennessee OR Nashville OR Memphis
OR Texas OR Houston OR Utah OR Vermont OR Virginia OR Richmond [ad] OR
Washington [tiab] OR Washington [ad] OR Seattle OR “West Virginia” OR Wisconsin
OR Wyoming
Update 3/20/17:
Carolyn just sent me an EMBASE version of the "United States" filter, see below:
'United States'/exp OR “united states” OR usa OR u.s.a. OR Appalachia* OR “great lakes” OR mid-atlantic-state* OR mid-atlantic-region* OR middle-atlantic-state* OR middle-atlantic-region* OR midwestern-us* OR ‘Midwestern u.s.’ OR Midwestern-state* OR Midwest-state* OR Midwest-us* OR ‘Midwest u.s.’ OR 'midwest u.s.a.' OR “great plains” OR heartland OR “new england” OR northeastern-us* OR ‘northeastern u.s.’ OR 'northeastern u.s.a.' OR northeastern-state* OR northeast-state* OR northeast-us* OR ‘northeast u.s.’ OR 'northeast u.s.a.' OR “pacific northwest” OR northwestern-us* OR ‘northwestern u.s.’ OR ‘northwestern u.s.a.’ OR ‘northwest u.s.’ OR ‘northwest u.s.a.’ OR northwest-us* OR northwestern-state* OR northwest-state* OR pacific-state* OR southeast-state* OR southeastern-state* OR southeast-region OR southeastern-region OR southeast-us* OR southeastern-us* OR ‘southeast u.s.’ OR ‘southeast u.s.a.’ OR ‘southeastern u.s.’ OR ‘southeastern u.s.a.’ OR southern-state* OR southern-us* OR ‘southern u.s.’ OR ‘southern u.s.a.’ OR southwest-state* OR southwestern-state* OR southwest-us* OR southwestern-us* OR ‘southwest u.s.’ OR ‘southwest u.s.a.’ OR ‘southwestern u.s.’ OR ‘southwestern u.s.a.’ OR “deep south” OR “black belt” OR “rust belt” OR “district of Columbia” OR “Washington dc” OR Washington-d.c. OR Alabama OR (Birmingham:ad AND al:ad) OR Huntsville:ad OR (Montgomery:ad AND al:ad) OR Alaska OR anchorage:ad OR fairbanks:ad OR Arizona OR Phoenix:ad OR Tuscon:ad OR Flagstaff:ad OR Arkansas OR “little rock” OR California OR “los angeles” OR “san diego” OR “san Francisco” OR Berkeley:ad OR Stanford:ad OR Colorado OR Vail:ad OR Denver:ad OR Connecticut OR Farmington:ad OR “new haven”:ad OR Hartford:ad OR Delaware OR Wilmington:ad OR Newark:ad OR Florida OR Miami:ad OR Gainesville OR Jacksonville OR Tampa OR Tallahassee OR Georgia OR Atlanta OR (Athens:ad AND ga:ad) OR (Augusta:ad AND ga:ad) OR Hawaii OR 'hawai i' OR Honolulu OR Idaho OR Boise:ad OR Illinois OR Chicago OR Urbana:ad OR Evanston:ad OR Indiana:ad,ti,ab OR Indianapolis OR "West Lafayette" OR Iowa OR Kansas OR Wichita OR Kentucky OR Lexington:ad OR Louisville:ad OR Bardstown:ad OR Louisiana OR “new Orleans” OR “baton rouge” OR Shreveport OR Maine OR Orono OR (Scarborough:ad AND me:ad) OR Maryland OR Bethesda:ad OR Baltimore:ad OR Rockville:ad OR “johns Hopkins” OR Massachusetts OR Boston OR Harvard OR (worcester:ad AND ma:ad) OR Burlington:ad OR Michigan OR Detroit OR “ann arbor” OR “east lansing” OR Minnesota OR Minneapolis OR Rochester OR “st paul”:ad OR “saint paul”:ad OR Mississippi OR (Jackson:ad AND ms:ad) OR Missouri OR (Columbia:ad AND mo:ad) OR Montana OR Bozeman:ad OR Missoula OR Nebraska OR Omaha:ad OR Lincoln:ad OR Nevada OR “Las Vegas” OR “New Hampshire” OR “New Jersey” OR “New Mexico” OR “New York” OR “North Carolina” OR “North Dakota” OR Ohio OR Columbus:ad OR Cleveland:ad OR Cincinnati OR Oklahoma OR Oregon OR Portland:ad OR Pennsylvania OR Philadelphia OR Hershey:ad OR “Rhode Island” OR providence:ad OR “South Carolina” OR “South Dakota” OR Tennessee OR Nashville OR Memphis OR Texas OR Houston:ad,ab,ti OR Utah OR Vermont OR Virginia:ad,ab,ti OR Richmond:ad OR Washington:ad,ab,ti OR Seattle OR “West Virginia” OR Wisconsin OR Wyoming