Cheryl Kagan, a former state delegate from Montgomery County, announced Tuesday that she plans to seek the Maryland Senate seat held by Sen. Jennie Forehand, one of the longest-serving members of the legislature.

Kagan became the second person in as many weeks to announce plans to run for the District 17 seat. Del. Luiz R.S. Simmons (D-Mongtomery) told supporters last week that he is running.

Forehand, meanwhile, has remained coy about whether she plans to seek reelection next year. She did not immediately return a phone call Tuesday.

“We need an effective advocate who will work tirelessly to protect our values,” Kagan said in a statement Tuesday. “In the Senate, I will speak up for our interests and for improving the quality of life in Rockville, Gaithersburg and all of Montgomery County.”

Kagan served as a delegate in District 17 between 1995 and 2003, when she chose to step down. In 2010, she challenged Forehand for Senate and narrowly lost.

Forehand served in the House of Delegates between 1978 and 1994 and has been a member of the Senate since 1995.

She said in an interview last week that she remains undecided about whether to seek reelection next year and probably won’t make an announcement for several more weeks.