A last-minute Republican effort to award Nebraska's five Electoral College votes on a winner-take-all basis - a change that would help Donald Trump's odds of winning the White House - appeared doomed on Monday, after a key Republican lawmaker said he opposed the proposal despite lobbying from Mr Trump's allies.
State senator Mike McDonnell said in a statement that he would not support altering Nebraska's current system, which splits its electoral votes by congressional district.
Democrat Kamala Harris, Mr Trump's opponent in the November 5th election, is slightly favoured to win one electoral vote from Nebraska's 2nd congressional district, which includes Omaha.
A bill to change the system would require 33 votes out of 49 seats in the legislature. Republicans control exactly 33 seats, which means they cannot afford even a single defection with Democrats united in opposition.
"I will not change my long-held position and will oppose any attempted changes to our electoral college system before the 2024 election," Mr McDonnell said in a statement, noting that the election is only 43 days away.
In an election expected to be among the closest in US history, every electoral vote will count. Unlike many countries, the US president is not elected by the national popular vote; instead, each state awards Electoral College votes in proportion to its population to the winner of that state. Maine and Nebraska are the only states that split their electoral votes.
Battleground states
With seven battleground states likely to determine the election, Nebraska's 2nd district vote looms large. For instance, if Ms Harris won the Rust Belt states of Michigan, Wisconsin and Pennsylvania, while Mr Trump captured the Sun Belt states of Arizona, Nevada, Georgia and North Carolina - an entirely plausible scenario, based on polling - the Nebraska vote would determine whether Ms Harris won 270-268 or whether the race ended up a 269-269 tie.
If the Electoral College is tied, the US House of Representatives selects the winner, with each state delegation getting a single vote - a scenario that would likely favour Mr Trump.
Mr Trump's allies have been pushing Nebraska Republicans to consider changing the electoral system. Republican US senator Lindsey Graham, who is close to Mr Trump, met with Nebraska lawmakers last week to discuss the proposal.
That one electoral vote could be the difference between Harris being president or not.
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"To my friends in Nebraska, that one electoral vote could be the difference between Harris being president or not," Mr Graham said on NBC's Meet the Press on Sunday.
The Trump campaign did not immediately respond to a request for comment on Monday. The Harris campaign referred a request for comment to the Nebraska Democratic Party, which did not immediately respond.
Mr McDonnell was elected as a Democrat but switched parties in April after the state Democratic Party censured him for his anti-abortion stances. He said he would encourage lawmakers to put the Electoral College question on the ballot in 2025, allowing the state's voters to decide.
Nebraska governor Jim Pillen, a Republican, has said he backs the proposed change and would be willing to call a special legislative session if he receives a clear indication that there are 33 votes in favour.
