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The two forged a bond in youth that withstood the test of time, personal and family sacrifice and, in McCain's case, spending more than five years as a prisoner of war in North Vietnam.
Senator Schumer said the decision to withhold the documents "has all the makings of a cover-up."
Famed opera singer Renee Fleming sang "Danny Boy" at McCain's funeral.
MALDEF said it was happy with the decision and expects the states to appeal to a higher court.
Experts said it is too late to safeguard U.S. voting systems and campaigns this election cycle.
"The America of John McCain has no need to be made great again, because America was always great."
Obama, along with former President George W. Bush, was personally asked by McCain to deliver a eulogy at his funeral.
Trade talks between the U.S. and Canada broke off on Friday without reaching a deal, but representatives are expected to resume discussions next week.
Elections officials said similar letters were sent from both leading candidates during the 2014 governor's race.
Former Secretary of State John Kerry won't rule out a run for the White House in 2020, but talking about it now is just a distraction.
The Trump administration is cutting nearly $300 million in planned funding for the U.N. agency that helps Palestinian refugees.
Illinois Gov. Bruce Rauner has granted eight requests for clemency and denied 85 other petitions.
DACA is an Obama-era program that protects young undocumented immigrants who came to the US as children from deportation.
The July 30, 2016, meeting between Steele and Ohr came one day before the FBI officially opened its counterintelligence investigation into possible ties between the Trump campaign and Russia.
US intelligence and military targeting experts have drawn up a preliminary list of Syrian chemical weapons facilities that could be struck if President Donald Trump were to order a new round of airstrikes in the country, multiple US officials tell CNN.
