LITTLE ROCK, Ark. — As first lady in the final year of the Clinton administration, Hillary Rodham Clinton endorsed a White House plan to give tax breaks to private foundations and wealthy charity donors at the same time the William J. Clinton Foundation was soliciting donations for her husband’s presidential library, recently released Clinton-era documents show. The blurred lines between the tax reductions proposed by the Clinton administration in 2000 and the Clinton Library’s fundraising were an early foreshadowing of the potential ethics concerns that have flared around the Clintons’ courting of corporate and foreign donors for their family charity before she launched her campaign for the 2016 Democratic presidential nomination. White House documents in the Clinton Library reviewed by The Associated Press show Hillary Clinton and Bill Clinton were kept apprised about a tax reduction package that would have benefited donors, including those to his presidential library, by reducing their tax burden.