(Reuters) - The U.S. House of Representatives plans to vote on Thursday on whether to renew the National Security Agency's warrantless internet surveillance program, which has been the target of privacy advocates who want to limit its impact on Americans.
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The vote is the culmination of a yearslong debate in Congress on the proper scope of U.S. intelligence collection, one fueled by the 2013 disclosures of classified surveillance secrets by former NSA contractor Edward Snowden.
The bill would extend the NSA's spying program for six years with minimal changes. Most lawmakers expect it to become law if it prevails in the House, although it still would require Senate approval and President Donald Trump's signature.
Trump appeared on Thursday to initially question the merits of the program, contradicting the official White House position and renewing unsubstantiated allegations that the previous administration of Barack Obama improperly surveilled his campaign during the 2016 election.
"This is the act that may have been used, with the help of the discredited and phony Dossier, to so badly surveil and abuse the Trump Campaign by the previous administration and others?" the president said in an early morning post on Twitter.
The White House did not immediately respond to a request to clarify Trump’s tweet but he posted a clarification less than two hours later.
"With that being said, I have personally directed the fix to the unmasking process since taking office and today’s vote is about foreign surveillance of foreign bad guys on foreign land. We need it! Get smart!" Trump tweeted.
Unmasking refers to the largely separate issue of how Americans' names kept secret in intelligence reports can be revealed.
Asked by a Reuters reporter at a conference in New York about Trump's tweets, Rob Joyce, the top White House cyber official, said there was no confusion within Oval Office about the value of the surveillance program and that there have been no cases of it being used improperly for political purposes.
Some conservative, libertarian-leaning Republicans and liberal Democrats were attempting to persuade colleagues to include more privacy protections. Those would include requiring a warrant before the NSA or other intelligence agencies could scrutinize communications belonging to Americans whose data is incidentally collected under the program.
The White House, U.S. intelligence agencies and Republican leaders in Congress have said they consider the tool indispensable and in need of little or no revision.
Without congressional action, legal support for Section 702 of the Foreign Intelligence Surveillance Act, which authorizes the program, will expire next week, although intelligence officials say it could continue through April.
Section 702 allows the NSA to eavesdrop on vast amounts of digital communications from foreigners living outside the United States through U.S. companies such as Facebook Inc, Verizon Communications Inc and Alphabet Inc's Google.
The spying program also incidentally scoops up communications of Americans if they communicate with a foreign target living overseas, and can search those messages without a warrant.
(Reporting by Dustin Volz; Additional reporting by Doina Chiacu and Susan Heavey; Editing by Lisa Von Ahn and Bill Trott)