As the Republican Convention is set to get underway in Ohio this week, thousands of protesters from multiple causes are descending on the venue.
Demonstrators hold placards during a march by various groups, including Black Lives Matter and Shut Down Trump and the RNC (Reuters)
The Quicken Loans Arena will host the convention from July 18 - 21 (local time), when tens of thousands of delegates and party supporters will be in attendance.
It is expected Donald Trump will be officially named as the Republican presidential candidate to take on presumptive Democratic nominee Hillary Clinton.
Mr Trump has enough delegates who've pledged support for him to get him over the line.
But while there'll be a lot of fanfare inside, outside the arena - or as close as authorities will allow at least - protesters, most notably the Black Lives Matter movement, will be making their voices heard.
Cleveland's police union has called for the suspension of a state law allowing people to carry firearms during the Republican National Convention following the killing on Sunday of three police officers in Louisiana.
But Ohio's governor says he's powerless to act.
After the shootings in Baton Rouge, in which three other police officers were wounded, the head of Cleveland's police union, Steve Loomis, asked Governor John Kasich to suspend state laws allowing people to openly carry firearms, but Kasich says he lacks the authority to do this.
"Ohio governors do not have the power to arbitrarily suspend federal and state constitutional rights or state laws as suggested," he said in a statement.
There are no plans to delay Monday's start of the Cleveland convention, where thousands of Republican delegates are gathering amid a threat of protests both for and against Trump.
Security is extraordinarily tight with downtown streets lined by concrete traffic dividers and tall metal fences, propelled by a new urgency after an attacker drove his truck into a holiday crowd in Nice, France, last week, killing 84 people.
Trump's goal at the convention is to get more American voters to take a fresh look at him and, he hopes, to see him in a more favourable light, after his victory over 16 other Republican candidates in a brutal battle marked by insults and inflammatory rhetoric that left many in the party divided.
The convention will also provide Republican faithful with their first look at his vice presidential running mate, Indiana Governor Mike Pence, who was announced on Saturday after a messy selection process.
Newshub political editor Patrick Gower is in Ohio for the convention.
Newshub. / AAP