Daylin Leach (born June 23, 1961) is a former American politician and lawyer, who was a member of the Pennsylvania State Senate for the 17th senatorial district from 2009 until 2020.

During his career, he co-hosted Lehigh Valley Firing Line, a local weekly political debate TV program.

In 2016, Philadelphia law firm Sacks Weston Diamond LLC[4] hired Leach to advise clients on medical marijuana licensing, permitting and regulatory rules.

[6][7] In the November 2002 rematch of their February special election, the Brooks campaign sent dozens of direct mail advertisements, including one accusing Leach of defending child molesters as an attorney.

'"[8] The charges stemmed from Leach's 1999 defense of an in absentia client from Texas who was sued in Allentown, Pennsylvania, for alleged comments in an Internet chat room.

[12] In 2003, the political website PoliticsPA named him to "The Best of the Freshman Class" list, saying that he "has all the ingredients of a rising star" and that he "makes the job look fun.

"[13] In August 2005, Leach published an op-ed article in The Philadelphia Inquirer criticizing the paper's coverage of the 2005 Pennsylvania General Assembly pay raise controversy.

[16][17] On September 1, 2005, Mario F. Cattabiani published a front-page article in The Philadelphia Inquirer that "exposed" Leach's long-standing and satirical blog "leachvent.com.

"[17][21] The Philadelphia City Paper criticized these negative articles about Leach by stating that "hidden behind the newspaper's florid obsession with Leach's naughty bits, is the state rep's pointed satire of their mediocre coverage – a criticism that the newspaper never addresses...The Inquirer savaged this young legislator because his satire was hitting its mark: Them.

[28] Leach faced attorney and East Norriton Township, Pennsylvania Board of Supervisors Vice Chairwoman, Amanda Cappelletti, in the Democratic party.

[47] On December 18, 2017, Leach announced he was "taking a step back" from his campaign to deal with misconduct allegations of sexual talk and inappropriate touching.

"[40] In January 2018, Meehan withdrew his candidacy for reelection after revelations that he had used taxpayer funds to settle a sexual harassment complaint.

)[49] After the Pennsylvania Supreme Court threw out the state's old congressional map, Leach's home, along with most of the Montgomery County portion of the old 7th, was drawn into the new 4th District, the successor to the old 13th.

On February 24, 2018, Leach finally succumbed to pressures from fellow Democrats, including Governor Tom Wolf, to abandon his congressional campaign, announcing his withdrawal on his Facebook page.