WASHINGTON, July 17 - U.S. President Donald Trump escalated his effort to make election security a central issue in November's midterm elections, asserting that China interfered in the 2020 presidential campaign despite a U.S. intelligence assessment that found no evidence to support that claim.

During a nearly half-hour prime-time speech from the White House on Thursday, Trump revived many of his longstanding claims that U.S. elections are unreliable, citing newly declassified documents that he said revealed "shocking vulnerabilities."

But many of the documents appeared to fall far short of backing his assertions. While Trump cast U.S. elections as highly vulnerable, he did not provide evidence of any votes in 2020 that were altered or manipulated.

HE PRESSES FOR PASSAGE OF THE 'SAVE AMERICA ACT'Trump used his remarks to again press fellow Republicans in Congress to pass legislation imposing new voter identification and citizenship requirements, despite established findings that voter fraud is rare. The bill, known as the SAVE America Act, has stalled in the Senate amid fierce Democratic opposition.

The speech came at a challenging political moment for Trump and Republicans, who are facing the prospect of losing one or both chambers of Congress in November with the president's approval rating weighed down by the unpopular Iran war and high energy prices.

Some Republican leaders have urged Trump to focus on issues that matter most to Americans, including high living costs, rather than the 2020 vote.

Trump briefly mentioned the war, saying the U.S. was "winning big," and listed domestic accomplishments such as tax cuts and his immigration crackdown before turning to election security.

The president said he was declassifying information that showed China had illicitly acquired 220 million U.S. voter files, including names, addresses and other data.

He asserted that members of the U.S. intelligence community deliberately suppressed the extent of China's activities.

An unclassified 2021 U.S. ...