Sen. Ted CruzRafael (Ted) Edward CruzTrump can save Republicans and restore sanity to California in 2018 Cruz says Cambridge Analytica assured him its practices were legal Dem battling Cruz in Texas: ‘I can understand how people think this is crazy’ MORE (R-Texas) jabbed President Obama on background checks and Syria on Wednesday night.

"President Obama announced that the United States is going to give weapons to the rebels in Syria," Cruz said during a panel at the Young Americans for Liberty's Annual National Convention. "I'll confess, my first reaction — we tweeted the simple question 'I wonder if President Obama is going to insist on a background check before he gives the rebels their weapons?' "

Cruz's jab is an allusion to President Obama's push earlier in the year to pass new laws expanding background checks on gun purchasers. But that effort failed to move beyond the Senate.

On Syria, Obama has received criticism from Tea Party Republicans and liberal Democrats in response to his decision to provide military support to Syrian rebels. In late June, House lawmakers introduced a trio of bills that aimed to limit funding the rebels.

Cruz was joined by Sens. Mike LeeMichael (Mike) Shumway LeeOvernight Defense: Senate sides with Trump on military role in Yemen | Dem vets push for new war authorization on Iraq anniversary | General says time isn't 'right' for space corps Senate sides with Trump on providing Saudi military support Senate, Trump clash over Saudi Arabia MORE (R-Utah) and Rand PaulRandal (Rand) Howard PaulHouse poised to vote on .3T spending bill Overnight Finance: Lawmakers race to finalize omnibus | What we know about funding bill | White House on board | Fed raises rates for first time under Powell Senate passes controversial online sex trafficking bill MORE (R-Ky.) at the event. The discussion touched on a range of issues, including what Senate Republicans would do if they retook their chamber in 2014. Paul said he was optimistic Republicans could pass legislation that would require an audit of the Federal Reserve if they gained control of the Senate.

"I think we have a really good chance, if we take over, of getting an audit the fed bill through," Paul said.