NEW You can now listen to Fox News articles! Conservative House Republicans are escalating a fight over government surveillance as Congress reopens debate this week on a controversial warrantless spying program. Members of the House Freedom Caucus are pledging to hold firm on adding a permanent ban on central bank digital currency (CBDC) to any legislation that reauthorizes Section 702 of the Foreign Intelligence Surveillance Act (FISA). But the proposal faces widespread opposition from Senate Democrats and is viewed as dead on arrival in the upper chamber. The cross-chamber standoff threatens to complicate Congress’ ability to meet a mid-June deadline to renew the spy law, which the Trump administration argues is a critical national security tool.  "If the Senate thinks they're going to keep rolling over us, it's just not going to happen," Rep. Chip Roy, R-Texas, said at a news conference in late April, referring to the Senate’s opposition to including a CBDC ban in a FISA renewal bill. Rep.…