Donald Trump on Monday linked Hillary Clinton with the weekend's attacks in New York, New Jersey and Minnesota, saying that a second Clinton presidency would make the U.S. less safe because of weak immigration policies and a soft-on-terror posture.

Speaking to a bursting-at-the-seams crowd of more than 8,000 at the Germaine Arena near Fort Myers, Florida, he took full political advantage of the bombings and knife attacks, saying they took place because the nation's Democratic leaders are flaccid and complacent.

Clinton 'very much caused the problem, when you think about it,' Trump said. 'Her weakness and her ineffectiveness caused the problem. And now she wants to be president? I don't think so.'

Republican presidential candidate Donald Trump took full political advantage of the weekend's terror attacks, placing blame squarely in Hillary Clinton's and Barack Obama's laps

Thousands waited in line to see Trump speak during a campaign rally near Fort Myers, Florida, and he blamed Hillary Clinton squarely for the rise of the ISIS terror army

He urged the U.S. Congress also to pass laws that would allow the American justice system to treat Islamic radicals with foreign roots as military enemy combatants – exempting them from civil trials and Constitutional due process.

'We must have speedy trials, and we must deliver a harsh and very just punishment to these people,' he said, lamenting that the suspect will be given expert medical care and a good lawyer.

Trump also said the U.S. should green-light interrogation methods designed 'to get information before it's no longer timely.'

Although he didn't say the word on his audience's mind, one man shouted it.

'Waterboard!' he yelled.

'Congress should pass measures to ensure that foreign enemy combatants are treated as such,' Trump said of what he called 'this monster of evil' rooted in a radicalized form of Islam.

Terrorist attacks on 9/11, in San Bernardino and Orlando, and now in Minnesota, New York and New Jersey, he said, 'were made possible because of our extremely open immigration system.'

'We have seen how failures to screen who is entering the United States, puts all of our citizens – everyone in this room – in danger.'

'My opponent has the most open-borders policy of anyone ever to seek the presidency,' Trump claimed of Clinton.

And he highlighted the backlog of foreign nationals whose countries of origin have refused to accept their deportation.

Trump has proposed voiding all immigration visas from those nations until they accept the return of their citizens.

'As secretary of state she allowed thousands of criminal aliens to be released into our communities because their home countries refused to take them back,' he siad of Clinton.

'They didn't want them! ... and she did nothing about it.'

Trump's rally over-filled an arena whose listed capacity is 8,000 people, and there were an estimated 1,500 more outside who never got in

Trump has pressed the case for months that the Obama administration has indiscriminately processed visas and work permits, filling nation-by-nation quotas without vetting individuals for their ability to assimilate into American culture.

'Hillary Clinton refuses to consider an applicant's worldview, and thus their likelihood of being recruited into the terror cause,' he said.

'We have to make sure we are only admitting people into our country who love our country. ... and we want them to love our people.'

Trump said there are more than 1 million pending deportation orders against people in the country illegally.

The Associated Press reported Monday, in addition, that the Obama administration mistakenly granted full citizenship to 858 people who were among them.

Trump said in Florida that there are more than 1 million pending deportation orders against people in the country illegally

'These are people who were supposed to be deported. And they were given full citizenship! They made a mistake. This is unacceptable,' Trump said.

The Republican nominee also returned to his attack on Clinton and Obama for refusing to engage in a rhetorical war of words on genocidal 'radical Islamic terrorists' who 'oppress women, gays, children and nonbelievers.'

'What is Hillary Clinton's suggestion? That we should censor our vocabulary?' he asked.

'Anyone who cannot name our enemy is not fit to lead this country.'

Trump pledged that if he runs the White House, the U.S. will fight ISIS not just with convention weapons, but also with 'financial warfare, cyber warfare and ideological warfare.'

'We have to beat them at their own game ... youth is going for their version, not our version,' he said.

'We want to defeat our enemies, and then we want to get back to rebuilding our country.'

Former House Speaker Newt Gingrich introduced Trump, mocking Clinton for complaining that Trump's hard-line approach to illegal immigration is among the reasons Islamists have exacted vengeance on the U.S.

'She decided the problem wasn't Islamic supremacists, the problem wasn't ISIS, the problem wasn't international terrorists that want to destroy out civilization ... She said the cause is clear: It's Donald Trump!'

'Donald Trump apparently, magically, in 1979 without realizing it, launched the terrorist war,' Gingrich snarked. 'In 1979 he wasn't even in business in Manhattan yet. But he was so precocious as a young man, so filled with talent, that apparently all of this was due to him!'

'Now do you know how deranged you'd have to be to say this with a straight face?'

Noting the size of his crowd on a Monday afternoon, Trump predicted he would carry Florida in November 'by a lot.'