Another prominent Republican is distancing himself from Donald Trump.
Former Florida Gov. Jeb Bush said Friday he will not vote for the presumptive Republican presidential nominee. He joins his father and brother, two former presidents, and 2012 GOP nominee Mitt Romney in declining to support Trump.
"Donald Trump has not demonstrated that temperament or strength of character. He has not displayed a respect for the Constitution. And, he is not a consistent conservative. These are all reasons why I cannot support his candidacy," Bush wrote in a Facebook post.
Bush added that he would not vote for likely Democratic nominee Hillary Clinton. He called the former Secretary of State an "untrustworthy liberal politician" who would bring "a third term of the disastrous foreign and economic policy agenda of Barack Obama."
With the departure of his last two remaining opponents this week, Trump, the billionaire businessman, all but assured he will be the party's standard-bearer in November. However, his positions and often divisive rhetoric have left many prominent Republicans hesitant to endorse him.
Throughout the primary process, though, Trump has tried to cast himself as a clear alternative to traditional Republicans. Bush, who was often considered the Republican front-runner when Trump entered the race last summer, frequently clashed with Trump on debate stages.
Trump repeatedly called Bush a "low-energy" person and criticized his family's legacy.
On Thursday, House Speaker Paul Ryan told CNN he was "not ready" to support Trump yet. He had previously said he would support the Republican nominee.
But Ryan's office said Friday that Trump, the speaker and other House Republican leaders will meet "to begin a discussion about the kind of Republican principles and ideas that can win the support of the American people" in November's election.