There will only be one REASON (not excuse).....voter fraud / corruption.
Liberal / Hillary Voter Fraud is / has already been documented this Presidential election cycle, and Hillary / Liberals could not even wait until the general election to begin.
From the very 1st DNC primary until now there has been a steady stream of voter fraud / corruption. The state DNC Chair, an ex-Hillary employee, for the 1st primary held STLL refuses to release the raw election data to prove Hillary won that 1st primary.
Hillary is such a horrible candidate that she has had to CHEAT her ass off just to win her own party's nomination...and she hasn't done it yet.
Liberal turnout was so low in 2014 that it resulted in an historic, record-setting loss for Democrats....and voter turnout so far for Liberals - in support of the 2 losers they have offered up - has been far lower than that in 2014. The numbers don't lie - Hillary...Liberals...are in trouble. By the numbers the record-setting loss experienced in 2014 should be wiped out of the books by the one coming later this year.
Democrats are doing everything they can to prevent that from happening, though...they have begun giving felons back the ability to vote, making sure the illegal population is ready to cast their votes, and Hillary's camp have been practicing during the primaries to perfect the voter/election fraud they will be engaging in this November.