By Mike Scarcella WASHINGTON, February 26 (Reuters) - A U.S. judge on Thursday declined to block President Donald Trump from proceeding with construction of a $400 million White House ballroom to replace the demolished East Wing, finding that a challenge from preservationists did not meet the high bar for a preliminary injunction that would halt the project for now. kAm&]$] s:DEC:4E yF586 #:492C5 {6@?VD CF=:?8 42>6 :? 2 =2HDF:E 3J E96 }2E:@?2= %CFDE 7@C w:DE@C:4 !C6D6CG2E:@?