"Democrats just denied our motion to subpoena Hunter Biden," the Republican members of the committee wrote on Twitter.

"They refuse to hold Hunter accountable for his shady business dealings that make us more dependent on China for renewable energy. It's past time for accountability."

Rep. Andy Biggs (R-Ariz.) made a motion to subpoena Hunter Biden, President Joe Biden's son, as a witness at its hearing about making all U.S. Postal Service (USPS) vehicles electric.

"I just made a motion to subpoena Hunter Biden as a witness for the House Oversight and Reform Committee's hearing on electrifying [the USPS]," Biggs wrote on Twitter. "Hunter sold a U.S. cobalt mine to a Chinese company. Cobalt is necessary for electric car production. Hunter's expertise is invaluable!"

Last week, House Republicans on the Oversight and Reform Committee called him to testify, according to a letter issued by Rep. James Comer (R-Ky.), and Democrats on the committee blocked a motion to issue a subpoena.

It came as White House press secretary Jen Psaki said on April 5 that Biden has "never spoken" with his son about "his overseas business dealings."

Recent reports from The Washington Post and other media outlets belatedly verified emails and documents on a laptop that formerly belonged to Hunter Biden. Reports about the younger Biden's laptop first surfaced in October 2020, with just days to go before the 2020 general election, although big tech firms quickly moved to suppress them.