Given there is no Republican in the race, Rabb is all but guaranteed to be elected in November to succeed retiring Democratic Rep. Dwight Evans.
Election analysts with the Cook Political Report rated both races in November as toss-ups.
The 2nd candidate in the runoff has not yet been called. Trump did not issue an endorsement in the fight for the right to challenge Democratic Sen. Jon Ossoff.
A top state official said concerns over vote-aggregation inside a ’secret bunker' were mischaracterized; critics say the ruling is a win for transparency.

Hospitals are subject to an administrative equity penalty if they continue referring to out-of-network providers.
The National Association of Realtors said buyers are entering the market with ‘cautious optimism’ amid economic uncertainty and rising mortgage rates.
The structure will feature a hospital, research facilities, meeting rooms, and dedicated spaces for military personnel.
Paxton is suing the Texas American Muslim University in Dallas, alleging the school was not authorized to offer degrees.
Pelosi backed Supervisor Connie Chan over polling leader Scott Wiener and former AOC chief of staff Saikat Chakrabarti two weeks before the June 2 primary.
The project will produce clay needed for cat litter and industrial uses for 20 years.

The election marks the first open primary for the seat being vacated by retiring Sen. Mitch McConnell (R-Ky.) since 1972.
A five-person committee will hand out funds from a nearly $1.8 billion settlement to Americans claiming to be victims of weaponization of government agencies.
The president had earlier announced he was holding off on pre-planned military strikes.
County leaders met with the health secretary in hopes of galvanizing federal support for tackling addiction and homelessness.
Georgia voters will cast ballots in high-profile primaries for governor, U.S. Senate, U.S. House, and several statewide offices.
‘These are not kids being kids. This is criminal conduct,’ U.S. Attorney for the District of Columbia Jeanine Pirro said.
The change would give some systems two more years to take out two forms of per- and polyfluoroalkyl substances.
The death was not connected to the cruise ship outbreak, authorities said.
The Coast Guard seized more than 511,000 pounds of cocaine last year, more than three times their annual average.
It comes after a summit between U.S. President Donald Trump and Chinese leader Xi Jinping in Beijing last week.
The Venezuelan regime said Saab was deported after being implicated in the commission of various crimes in the United States.
The Breathitt County School District still plans to take Meta Platforms, which owns Facebook and Instagram, to trial next month.