A Republican effort to lock down all of Nebraska’s electoral votes for former President Donald Trump appears doomed because one state lawmaker won't give backers his crucial support.

A GOP-led effort to move Nebraska to a winner-take-all electoral college system was dealt another blow Monday as state Sen. Mike McDonnell (R) said he wouldn't support the change. Why it matters: McDonnell's announcement makes the likelihood of Republicans generating enough votes for the measure very unlikely,

A Nebraska Republican state lawmaker said Monday that he remains opposed to switching how the state allocates its electoral votes, effectively blocking a bid by President Donald Trump and his allies to change the system in a bid for an extra electoral vote this fall.