Just as her new book praising Donald Trump, In Trump We Must, hits the shelves, Ann Coulter appears to now be souring on the Republican nominee she calls our  only hope. After Trump appeared to flip flop on one of his biggest campaign promises   deporting 11 million undocumented immigrants   Coulter, who has made immigration her number one issue, sent out a frenzy of tweets mocking Trump for his perceived weakness on the issue:Only part he left out was the  hoops  they ll have to jump through! Trump: No citizenship. Let me go a step further they ll pay back-taxes  Ann Coulter (@AnnCoulter) August 25, 2016 Trump:  they have to pay taxes, there s no amnesty  [Pro Tip:  Back taxes  means we pay illegals $30k apiece in EITC.}  Ann Coulter (@AnnCoulter) August 25, 2016It s not  amnesty.  It s  comprehensive immigration reform !!!! Trump:  they have to pay taxes, there s no amnesty.  Ann Coulter (@AnnCoulter) August 25, 2016 Well, if it s  hard,  then nevermind. Trump:   to take a person who s been here for 15 or 20 years  .It s a very, very hard thing.  Ann Coulter (@AnnCoulter) August 25, 2016It s  hard  to deport someone who s been here FOUR YEARS! https://t.co/Ajbon3TcDP  Ann Coulter (@AnnCoulter) August 25, 2016Coulter also told reporters that if Trump continues to back down on his immigration promises made during the primaries, she would cease her upcoming book tour for In Trump We Must. On MSNBC s Hardball Coulter told Chris Matthews that his softening tone was a  mistake  and said it  sounds like it s coming from advisors. Trump is in big trouble. Ann Coulter is basically severing ties with the xenophobic billionaire, and if Ann Coulter can t support you, then there goes a chunk of right-wing support.The impending Coulter-Trump war is a glorious gift from the political gods and it could not have come at a better time. Trump is already having a hard time getting GOP support. A tiff with Coulter and other right-wing ideologues is not the best idea.Featured image via Gage Skidmore/Getty Images