Nancy Pelosi's record-setting speech in the House of Representatives probably would've gone longer if she'd consulted with the modern-day king of filibusters ... Ted Cruz.
We got the Senator Thursday at the D.C. Prayer Breakfast, where we asked what the hardest part was about giving a marathon speech in Congress. He would know ... he's up there with a 21-hour diatribe against Obamacare, when he famously read "Green Eggs and Ham."
Ted says Rand Paul -- who's also experienced in long speeches -- gave him some great advice that might've served Pelosi well for her own relatively meager record address.
Here's a hint ... comfort below the belt is KEY.