U.S. Republican senators introduced their own bill on Tuesday to support Kiev and impose sanctions on Russia over its military buildup near Ukraine’s borders, after bipartisan negotiations on a previous sanctions bill stalled.

The introduction of a new bill called the “Preserving Territorial Integrity in Europe Act” (NYET) does not mean that negotiations between Republicans and Democrats on a bipartisan Ukraine bill have ended, a senior Republican staffer said.

Further action on the new bill is not entirely clear, given that Democrats hold majorities in the Senate and House of Representatives. The bill calls for an immediate halt to construction of the Nord Stream-2 pipeline and mandatory sanctions against it if Russia invades Ukraine.

In addition, the bill calls for sanctions against major Russian banks in the event of an attack on Ukraine and secondary sanctions against financial institutions that do business with sanctioned banks.

The head of the Senate Foreign Relations Committee, Democrat Bob Menendez, disapproved of the Republicans’ initiative: “The new proposal is largely a reflection of what the Democrats have already agreed to in our ongoing consultations, it builds on the comprehensive sanctions that we originally submitted (to Congress).”

The sanctions proposed by U.S. senators against Russia’s leadership could be likened to a divestment initiative designed to put pressure on Moscow during talks with Washington and NATO on security in Europe, Kremlin spokesman Dmitry Peskov said in mid-January.