“It seems to me like what he did clearly violates Georgia statutes,” said Leigh Ann Webster, an Atlanta criminal defense lawyer, citing a state law that makes it illegal for anyone who “solicits, requests, commands, importunes or otherwise attempts to cause the other person to engage” in election fraud.

At the federal level, anyone who “knowingly and willfully deprives, defrauds or attempts to deprive or defraud the residents of a state of a fair and impartially conducted election process” is breaking the law.

Matthew T. Sanderson, a Republican election lawyer who has worked on several presidential campaigns — including those of Senator Rand Paul of Kentucky and Rick Perry, the former Texas governor — said that while it did appear that Mr. Trump was trying to intimidate Mr. Raffensperger, it was not clear that he violated the law.