Even though his campaign billed the speech as one in which he would offer more specifics in his plan to destroy ISIS, Trump repeated his previous stance that he doesn't want to tip off his enemies regarding military operations.
Recent polls show him significantly trailing Hillary Clinton in key battleground states.
Painting a grim picture of a world under attack and a homeland threatened by terrorism, Trump argued only he could be trusted to confront the present dangers. He characterized the fight as an ideological struggle on par with that of the Cold War that demands a sweeping rethink of USA policies at home and overseas.
Nevertheless, the content of his address served to reiterate the more nationalistic and belligerent aspects of Trump's campaign platform: his proposed restrictions on immigration, willingness to use brutal tactics to achieve his foreign policy goals, and a doubling down on the angry rhetoric Republicans like to level at "radical Islamic terrorism".
He also vowed "a swift and decisive end" to "the era of nation-building", promising to galvanize the global community to jointly confront the terrorist threat and vowing to partner with any country willing to join in that mission.
In a policy speech, Trump said he would wage a multi-front "military, cyber and financial" war against Islamic State, although it was not clear how that would differ from the Obama administration's fight with the jihadist group.
Nor does the campaign say whether additional screenings would apply to the millions of tourists who spend billions of dollars visiting the United States each year.
Speaking in Ohio, Trump said: "The time is overdue to develop a new screening test for the tests we face today". "I had previously said that North Atlantic Treaty Organisation was obsolete because it failed to deal adequately with terrorism; since my comments they have changed their policy and now have a new division focused on terror threats", he said, adding that the apparent development is "very, very good".
"As president, I will call for an worldwide conference focused on this goal". Although he subsequently labeled the remark as sarcasm, Trump then said that Obama and Clinton had created the "vacuum" that allowed the Islamic State to form, an apparent reference to the 2011 US military withdrawal from Iraq.
"Our country has enough problems". But Europe is facing a much larger influx of refugees than the USA; as Nowrasteh pointed out, migrants "can walk [to Europe], or take a short boat ride". He said the policy would first require a temporary halt in immigration from risky regions of the world.
"How can Trump put this forward with a straight face when he opposes marriage equality and selected as his running mate the man [Mike Pence] who signed an anti-LGBT law in IN?" "It's a cynical ploy to escape scrutiny of his outrageous proposal to ban an entire religion from our country and no one should fall for it".
"Incident after incident proves again and again Hillary Clinton lacks the judgment. stability and temperament and the moral character to lead our nation", he charged. "But we must use ideological warfare as well".
He went on to say that, if elected, his government would befriend the moderate Muslim reformers in the Middle East, and would help to eradicate various evils, for instance: honor killings.
Mr Biden called Mr Trump's views "dangerous" and "un-American" and said that his false assertions last week about President Barack Obama founding IS could be used by extremists to target American service members in Iraq.
Trump's speech was aimed at resetting his struggling campaign against Democratic rival Hillary Clinton.
Trump has since said he was being sarcastic in accusing Obama of founding IS.
Though he indicated his willingness to work with Muslim allies in his speech Monday, his remarks come against a backdrop of fierce criticism and condemnation of the Republican candidate from Muslims in the U.S. and overseas since December, when he proposed "a total and complete shutdown of Muslims entering the United States".
The proposal has been through several iterations, with Monday's speech just the latest to provide a venue for further clarity.
This was supposed to be a more somber, presidential side of Trump, not the unhinged id on display at his rallies-and still, he painted immigrants, especially Muslim immigrants, as enemies of America.
While his campaign staff and surrogates have sought to describe the ban on individuals from terror states as a rollback of Trump's blanket ban on Muslim immigration, Trump characterized it on NBC's "Meet the Press" as an "expansion" and has yet to refute his original proposal.
During the primary season, Trump promised "quickly and decisively bomb the hell out of ISIS" and in March, he suggested that he would be willing to support a massive ground force to take on the terror group. "Only those who we expect to flourish in our country - and to embrace a tolerant American society - should be issued visas".
"We should only admit into this country those who share our values and respect our people".
"We want to build bridges and erase divisions".
The proposal, which the campaign said also draws its precedent from Reagan-era presidential proclamations prohibiting the entry of illegal migrants by sea, is part of a speech that Trump will deliver Monday in OH outlining his plan to "Combat Radical Islamic Terror".