Terrorist groups that attempt to undermine the U.S. and its national security will always have some connection to Iran, Florida Republican Rep. Ros-Lehtinen charged Wednesday.Ros-Lehtinen, a member of the House Foreign Affairs Committee, told Newsmax TV in an exclusive interview that it was especially "disheartening" the U.S. has yet to hold Iran accountable as the nation marks the 30th anniversary of an Iranian suicide bombing that killed 241 servicemen at a Marine Corps barracks in Beirut."We need to follow the money in every one of these terrorist attacks and you will see that the money always links back to Iran," she said. "They have the financial infrastructure to fund a jihadist organization. Whether it's Hezbollah, whatever it is, any terrorist group that seeks to undermine the United States and our national security interests will have Iran's fingerprints on it.""What we need to do is find the perpetrators and bring them to justice," she said. "We will not give in, we will never give up, and we will find those responsible and hold them accountable."The lawmaker also cautioned the U.S. should not ease sanctions against Iran while negotiations about its nuclear program are ongoing."I believe that sanctions have been effective and . . . must continue," she said. "We should ratchet up the pressure."She charged that Iranian leader Hassan Rouhani will "do his charm offensive, smile a lot, lie, cheat and steal as a way of trying to get the U.S. to undo sanctions," insisting Iran is not sincere about negotiating on their nuclear program."We should not fall for what I call the Rouhani ruse," she said. "He is the master of deceit, he is the negotiator who built the nuclear program.""If the Saudis see that Iran is going to get away with having nuclear weapons, they in Saudi Arabia have the financial wherewithal to build up such an arsenal and we will have an arms race that will have no end in sight," she added.