President Donald Trump won't have a primary challenger in New York after former Massachusetts Gov. Bill Weld failed to qualify for the April 28 ballot, the state Board of Elections on Tuesday determined.

Weld, who briefly mounted a campaign for governor of New York in 2006, is running a long-shot primary bid against Trump. 

New York Republican Chairman Nick Langworthy cheered the development, saying it was a sign the GOP in Trump's native state is behind him. 

“Today confirms what we already knew to be true: New York Republicans are 100% united behind our great President Donald J. Trump," Langworthy said in a statement. "The Board of Elections certified that President Trump is the only presidential candidate qualified to be on the ballot, therefore there will be no Republican presidential primary."

But the development is not necessarily good news for Republicans running down ballot. Democratic voters will be voting on April 28 for their party's primary in addition to a handful of closely watched special elections, including races for a vacant central New York state Senate district and the congressional seat vacated by former Rep. Chris Collins. 

The Collins seat in particular is heavily Republican. 

But Democrats could have a slight edge if the presidential primary remains contested at that point in the calendar and more party voters come to the polls. 

Democrat Nate McMurray faces Republican Chris Jacobs for the 27th House district; Democrat John Mannion will compete against Republican Angi Renna for the Syracuse-area seat. 

Langworthy blamed Cuomo for scheduling the special election on the same day as the presidential primary. Cuomo has said the move is meant to save money on running elections. 

"New Yorkers will reject Democrats’ radical agenda and vote to return common sense to this state.,” Langworthy said.