On April 18, the Kentucky legislature adjourned, without having passed SB 205, which would have let U.S. Senator Rand Paul run for re-election in 2016 even if he is also running for the Republican presidential nomination. See this story.
Kentucky, like most states, holds legislative elections this year. The Senate has a Republican majority and had passed the bill; the House has a Democratic majority and refused to consider the bill. If Republicans were to win a majority in the Kentucky House this year, the bill would probably pass in the next legislative session.
The press consistently fails to mention that Henry Clay was elected to the U.S. House from Kentucky in 1824 even though he was also running for President that year. He carried Kentucky in the electoral college.