WASHINGTON, April 15, (AP): Former US president Joe Biden returns to the national stage Tuesday to elevate liberal concerns that President Donald Trump's agenda is threatening the health of Social Security. The 82-year-old Democrat has largely avoided speaking publicly since leaving the White House in January. That's even as Trump frequently blames Biden for many of the nation's problems, often attacking his predecessor by name.

Biden is expected to fight back in an early evening speech to the national conference of Advocates, Counselors and Representatives for the Disabled in Chicago. While Biden has made a handful of public appearances in recent weeks, Tuesday's high-profile address focuses on a critical issue for tens of millions of Americans that could define next year's midterm elections.

"As bipartisan leaders have long agreed, Americans who retire after paying into Social Security their whole lives deserve the vital support and caring services they receive,” said Rachel Buck, executive director of the ACRD. "We are thrilled the president will be joining us to discuss how we can work together for a stable and successful future for Social Security.”

Trump almost immediately began slashing the government workforce upon his return to the White House, including thousands of employees at the Social Security Administration. Along with a planned layoff of 7,000 workers and controversial plans to impose tighter identity-proofing measures for recipients, the SSA has been sued over a decision to allow Elon Musk's Department of Government Efficiency to access individuals’ Social Security numbers and other personally identifiable information.

Musk, the world’s richest man and one of Trump’s most influential advisers, has called Social Security "the biggest Ponzi scheme of all time.” At the same time, Social Security recipients have complained about long call wait times as the agency’s "my Social Security” benefits portal has seen an increase in outages. Individuals who receive Supplemental Security Income, including disabled seniors and low-income adults and children, also reported receiving a notice that said they were "not receiving benefits.”

The agency said the notice was a mistake. And the White House has vowed that it would not cut Social Security benefits, saying any changes are intended to reduce waste and fraud. Biden will be joined in Chicago by a bipartisan group of former elected officials, including former Sen. Roy Blunt, R-Mo., former Sen. Debbie Stabenow, D-Mich., and former Social Security Administrator Martin O’Malley.