WASHINGTON — House lawmakers are preparing to vote on a Senate-approved Russia sanctions package that would impose mandatory penalties on Russian leaders, the country’s energy sector and businesses tied to Moscow’s defense industry. The legislation passed the Senate by an 86-11 vote in August and has White House backing. The House Rules Committee is scheduled to meet Monday afternoon to consider the measure, which faces a more uncertain path in the lower chamber after Republican leaders declined to place it on the agenda when lawmakers returned from their August recess. The bill’s central point of contention is a provision allowing President Donald Trump to impose tariffs of up to 100% on major buyers of Russian oil. Democrats, including House Minority Leader Hakeem Jeffries, argue that authority would give the president an overly expansive economic weapon at a time when the administration has already shown a willingness to use tariffs against both allies and adversaries. “Donald Trump already has ample authority to impose sanctions on the companies, individuals, and vessels propping up a Russian war machine that continues its deadly attacks on Ukraine,” Reps. Gregory Meeks of New York and Richard Neal of Massachusetts said in a joint statement with Rep. Don Beyer of Virginia and Sens. Ron Wyden of Oregon and Elizabeth Warren of Massachusetts. “Congress does not need to greenlight new tariff authority for the President to impose those sanctions on Russia today.” Meeks later accused the White House of pressing Speaker Mike Johnson to advance the bill because Trump wants additional tariff power, rather than because existing sanctions tools are inadequate. Supporters counter that the threat of massive tariffs could give the administration leverage to pressure Russian President Vladimir Putin to end the war in Ukraine. The bill also targets Russia’s so-called shadow fleet, a network of vessels used to move oil and evade sanctions. Sen. Jeanne Shaheen, a New Hampshire Democrat and the Senate Foreign Relations Committee’s ranking member, urged the House to act after the vote was announced. She said Ukrainian civilians are still being killed and argued that the bill would strike at the Kremlin’s financial resources while pushing Putin toward negotiations. A European official who was granted anonymity to discuss sensitive legislation said the proposal was imperfect but would provide the administration with additional leverage and demonstrate political support for Ukraine. “Russia ought to be sanctioned to smithereens,” the official said. The House debate puts lawmakers in the familiar position of weighing tougher action against Moscow against the risk that broad economic powers could raise costs for American consumers and businesses. Tariffs on major Russian oil customers could also affect global energy markets, depending on how widely and aggressively the authority were used. The measure’s prospects remain unclear. Republican enthusiasm has cooled since the sudden death of Sen. Lindsey Graham, who had been one of its leading champions, while Democrats remain concerned that the tariff provision could be used far beyond Russia policy. The upcoming House consideration will determine whether a bill that cleared the Senate with overwhelming bipartisan support can survive the political and economic objections awaiting it in the lower chamber.