Former GOP presidential candidate Ron Paul made a fundraising pitch for his son’s struggling campaign days ahead of the year-end fundraising deadline.

The former Texas senator — who ran for president in 1988, 2008 and 2012 — recorded an audio message on Twitter for Sen. Rand Paul Randal (Rand) Howard PaulRand Paul says he can't judge 'guilt or innocence' in Breonna Taylor case Overnight Health Care: Health officials tell public to trust in science | Despair at CDC under Trump influence | A new vaccine phase 3 trial starts Health officials tell public to trust in science MORE (R-Ky.) encouraging supporters to donate to the Kentucky senator’s campaign before the Dec. 31 deadline.

ADVERTISEMENT

“You are part of the best grassroots organization out there. You’re his secret weapon,” Ron Paul said in the audio. “So please dig deep today and throughout the end-of-the-year money bomb to help Rand fully fund these grassroots operations.”

He continued, “Rand is the only candidate with a sane foreign policy, the only one fighting for the entire Bill of Rights, and he is leading the fight against the Federal Reserve. He can do it if we step up to the plate and help him.”

Paul has been suffering in national polls, lagging behind in the single-digits. He was almost relegated to the most recent undercard debate, but CNN tweaked its debate rules at the last minute.

The next GOP debate on Jan. 14 may have as few as six candidates on the prime-time stage, with Paul again in danger of being left off. He said last week he won’t participate in the undercard debate if he doesn’t make the main debate hosted by Fox Business Network.