​A political group that supports Donald Trump spent more than $40 million on legal costs in the first half of 2023 to defend the former president, his advisers and others, sources familiar with a filing detailing the costs confirmed to ABC News.

That number spent by the Save America leadership PAC, Trump's main fundraising arm, was first reported by The Washington Post.

The financial filing is expected to be released Monday.

The mounting costs come as Trump faces mounting legal troubles, including a superseding indictment handed up from a federal grand jury via special counsel Jack Smith's investigation into Trump's allegedly improper retention of classified documents after leaving office.

MSNBC's Claire McCaskill isn't buying the excuse that Donald Trump kept classified documents as keepsakes from his presidency and instead suggested he was planning on selling them.

...McCaskill agreed that Trump posed a national security threat and speculated that he was planning to sell classified materials to Saudi Arabia.

"It's just fascinating to me that people in Congress who understand the consequences of what he has done and how he has done it, continue to defend him," she said. "I mean, you know, we've talked about what he would do with these documents. One of the things ... is that he could use them to continue to curry favor with Saudi Arabia, and what could Saudi Arabia do for Donald Trump right now? They could cut production of oil and raise gas prices. Nothing could hurt Joe Biden more than raising gas prices next year, three, four months from the election, and Trump knows that."​