PHOTO: President Trump speaks to media after attending the wake of slain NYPD Officer Johnathan Diller at the Massapequa Funeral Home on March 28. Spencer Platt/Getty Images

Joining Biden on the Democrat ticket: ex-candidates Dean Phillips and Marianne Williamson. GOP alternatives to Trump: defeated rivals Nikki Haley, Chris Christie and Vivek Ramaswamy.

By Chris McKenna | The Journal News

New Yorkers head to the polls Tuesday April 2 for low-stakes presidential primaries in which they can either affirm their parties’ inevitable nominees or register dissent with protest votes.

President Joe Biden and Donald Trump both clinched the nominations in delegate counts three weeks ago after blowing past competitors in other states since January.

Activists opposed to the war in Gaza have urged Democratic voters to choose yet another option to show discontent with Biden’s Israel support: casting a blank ballot.

How many wind up doing so after eight days of early voting and the main event on Tuesday won’t be known until official results are posted at least two weeks later.

The Biden-Trump rematch becomes official when party delegates formally nominate them at conventions this summer. Republicans have their convention in Milwaukee in July. Democrats have theirs in Chicago in August.

Here’s what you need to know to vote on Tuesday.

Who else will be on the primary ballots

Former rivals who left the race remain on both Democratic and Republican ballots in New York, giving disaffected voters on both sides a reason to show up.

Joining Biden on the Democratic ballot are ex-candidates Dean Phillips and Marianne Williamson. The Republican alternatives to Trump are defeated rivals Nikki Haley, Chris Christie and Vivek Ramaswamy.

Am I voting on any local candidates on April 2?

No. Only the presidential race is on Tuesday’s ballots. New York will hold separate primaries for Congress and state legislature seats on June 25.

How do I know if I can vote in Tuesday’s primary?

Check your voter registration. Only voters enrolled as Democrats or Republicans can vote in their party’s primary.

Verify online that you are registered and enrolled in a party through the state Board of Elections database, at voterlookup.elections.ny.gov. If you aren’t registered, it’s too late to do so for this election.

How do I know where to vote?

Your online registration record also identifies your poll site. Polls are open from 6 a.m. to 9 p.m., statewide. ##

Chris McKenna covers government and politics for The Journal News and USA Today Network. Reach him at cmckenna@gannett.com.