WASHINGTON -- Wary of Iran's nuclear intentions, senators are predicting a bipartisan push for fresh penalties and increased leverage against Tehran despite administration opposition, and waiting to hear directly from Secretary of State John Kerry about the latest round of talks that failed to produce a deal. Kerry tried to reassure skeptical members of Congress after negotiations in Geneva between Iran and Western powers stalled, with France turning down a list of demands on Iran, saying they were too generous to mean an easing of international sanctions. "Some of the most serious and capable expert people in our government who have spent a lifetime dealing both with Iran, as well as with nuclear weapons and nuclear armament and proliferation, are engaged in our negotiation. We are not blind, and I don't think we're stupid," Kerry said on the NBC News program Meet the Press. He added: "We're not going into a full deal and giving away something. We're talking about stopping their program where it is, with enough guarantees to know that it is, in fact, stopped where it is, while we then negotiate the full measure of the deal with our allies." Administration officials led by Vice President Joe Biden and including Kerry had persuaded a number of senators late last month to delay consideration of a new round of penalties before the international talks had begun. Sen. Bob Corker (R-Tenn.) said the Senate's Democratic leadership had called off a Senate Banking, Housing and Urban Affairs Committee session this coming week to examine proposed sanctions, and that Kerry would be on Capitol Hill to brief lawmakers about Iran. "I do know that on both sides of the Capitol, on both sides of the aisle right now, people are really looking at what the next steps ought to be," Corker told NBC. "All of us want to see diplomacy," he said. "We do. And we thank the secretary for the efforts that he's putting forth. That is the best way to resolve this issue. But we're also concerned about an administration that seems really ready always to jump into the arms of folks and potentially deal away some of the leverage we have."