Cassilly Files for Reelection for Harford County

Harford County Executive Bob Cassilly officially filed for relection for Harford County Executive on May 23.
This is not a shocker as he can only serve for two terms and he is wrapping up first term.
The question is if he will face any legitimate opponents in the GOP primary?
The next question is if he will be joined by any other Republican County Executives in the Baltimore area. The Democratic County Executives in Howard, Anne Arundel and Baltimore counties are all term limited out (Interim Baltimore County Executive Kathy Klausmeier said she would not sit re-election in 26) so all three of those seats will be open.
Republicans won the County Executives races in Howard and Anne Arundel counties in 2014.
Can any Republicans from those counties (and perhaps Baltimore County) become a GOP County Executive in 2026