Trump presumptive GOP candidate, Cruz drops out

Donald Trump is the presumptive Republican presidential nominee following a decisive victory in the Indiana primary and the decision by Ted Cruz to drop out of the race.

Though Trump has not formally secured the 1,237 delegates he needs to win the nomination - and likely won't until June - there is no serious opposition left to block his path.

His victory amounts to a stunning takeover of the Republican Party by a candidate with no political experience. Along the way, he eviscerated the GOP's most accomplished presidential field in a generation and captured the mood of a party in which grassroots voters harbour what CNN calls "deep ill will toward establishment elites".

"It is a beautiful thing to watch, and a beautiful thing to behold," Trump said during a victory speech. "We are going to make America great again."

Cruz tried everything to pull off a last-ditch win in Indiana, including the unusual move of selecting former Hewlwtt-Packard CEO Carly Fiorina as his running mate even though he wasn't the nominee. He also forged a pact with John Kasich that would allow him to focus on Indiana while the Ohio governor would devote his time to later states. But none of the moves worked.

"We left it all on the field in Indiana. We gave it everything we've got but the voters chose another path," Cruz said. "So with a heavy heart but with boundless optimism for the long-term future of our nation, we are suspending our campaign."

Following Cruz's speech, Republican National Committee Chairman Reince Priebus tweeted Trump is now the presumptive nominee and encouraged the party to "unite and focus on defeating" Hillary Clinton

Trump's candidacy has galvanized the GOP, bringing in voters - especially in regions like the Rust Belt - that might not otherwise be attracted to the party's message. In the process, he's toppled a GOP field that, at the start, included many well-respected governors and senators.

Republican elites now face the long-feared reality of Trump as an outsider nominee who will lead them into the fall campaign after splitting the party, overturning establishment and conservative power bases and alienating key general election voters with incendiary rhetoric.

Opponents to fight on
The anti-Trump movement said it would fight on as Trump was still short of the delegates needed to secure the nomination. Katie Packer, the chair of Our Principles PAC, said there is still time for Trump to "continue to disqualify himself in the eyes of voters".

"We continue to give voice to the belief of so many Republicans that Trump is not a conservative, does not represent the values of the Republican Party, cannot beat Hillary Clinton, and is simply unfit to be President of the United States," she said in a statement.

For his part, Kasich insisted he would remain in the race.

"Tonight's results are not going to alter Gov Kasich's campaign plans," said John Weaver, Kasich's chief strategist. "Our strategy has been and continues to be one that involves winning the nomination at an open convention."

Sanders to win Indiana
Meanwhile, Bernie Sanders will win the Indiana Democratic primary, according to a CNN projection. That victory could help boost his campaign's morale but is unlikely to cut deeply into Clinton's large delegate lead that has her on track for the nomination.

Trump's dramatic victory caps a day of extraordinary developments in the Republican race.

Cruz, facing the prospect of an Indiana defeat, snapped after weeks of personal attacks from Trump that included fresh insinuations that his father was associated with Lee Harvey Oswald.

"I'm going to tell you what I really think of Donald Trump," he told reporters at a morning news conference.

Cruz blasted Trump as a "pathological liar", "utterly amoral", "a narcissist at a level I don't think this country's ever seen" and "a serial philanderer."

He unleashed his full arsenal of insults in his attack on Trump.

"He is proud of being a serial philanderer ... he describes his own battles with venereal diseases as his own personal Vietnam," Cruz said, citing a decades-old Trump appearance on 'The Howard Stern Show'.

"This man is a pathological liar, he doesn't know the difference between truth and lies ... in a pattern that is straight out of a psychology textbook, he accuses everyone of lying," Cruz said as Indiana voters headed to cast their ballots. "Whatever lie he's telling, at that minute he believes it ... the man is utterly immoral," Cruz said.