When it comes to investing, natural gas is a “long-term theme,” says Mad Money host Jim Cramer, who describes it as an energy source that’s 40 percent cleaner than coal, 30 percent cleaner than oil, and much more realistic as a bridge fuel than wind or solar when it comes to combating climate change or ending America’s addiction to foreign oil.

So what’s Cramer’s problem with natural gas? He thinks Washington doesn’t get the picture, that’s what. Cramer invited Rep. John Sullivan (OK-1) on his show Monday night to discuss the prospects for enhancing America’s energy security with this inexpensive, clean-burning domestic fuel.

He couldn’t have picked a better guest. For decades, Oklahoma’s First Congressional District, which Sullivan represents, has been been a national leader in energy production. Sullivan is continuing this tradition as the lead Republican sponsor of the bipartisan NAT GAS Act in the House, which now has 130 cosponsors from both sides of the aisle.

Sullivan’s take on natural gas is simple and straightforward. It is “the bridge fuel as we look at an all-of-the-above strategy,” he told Cramer. Later, he added that “alternative energy sources aren’t going to happen for a long time. We have 120 years’ reserves of natural gas here in America.”

Watch the entire interview on Mad Money HERE.