Conservative Interim Leader Rona Ambrose is expected to announce Tuesday that she’s stepping down as an MP and won’t run in the 2019 federal election, according to several sources.

Ambrose is scheduled to make what her office is billing as her “final public speech as Leader of the Official Opposition” to the Canadian Club of Ottawa at the Fairmont Château Laurier in the morning, but the sources say she’ll make the announcement that she’s stepping back from federal politics later in the House of Commons.

With the Conservative party choosing its new leader on May 27 and Prime Minister Justin Trudeau headed to Seattle, Washington Wednesday for the two-day Microsoft Summit, Tuesday is the last opportunity for Ambrose to make the announcement in the Commons, with Trudeau in attendance, before the House breaks next week for Victoria Day.

Ambrose’s office didn’t respond to a request for comment, and Conservative MP Tony Clement told iPolitics he wasn’t aware of an impending announcement.

One complicating factor could be Ambrose’s private member’s bill — the Judicial Accountability through Sexual Assault Law Training (or JUST) Act — which would require new federally appointed judges to complete courses on sexual assault.

Last Friday, the status of women committee returned the bill to the House with some amendments, and a spokesperson for Justice Minister Jody Wilson-Raybould confirmed Monday that the Liberals will support it.

The NDP is trying to get the legislation fast-tracked.

First elected in the Alberta riding of Edmonton—Spruce Grove in 2004, Ambrose served in a number of cabinet positions in the Harper government, including health, environment, labour and public works.

Following the 2015 federal election, she was chosen as interim leader by the Conservative caucus in November 2015.

Well-liked by her caucus colleagues, the only real blemish on Ambrose’s record as interim leader was an ill-advised December 2016 vacation on the yacht of billionaire energy mogul and Calgary Flames co-owner Murray Edwards, which occurred while her colleagues were attacking Prime Minister Trudeau for his holiday trip to the Aga Khan’s private Caribbean island.

A Forum Research poll from late April gave her an approval rating of 32 per cent and a disapproval rating of 23 per cent, while 45 per cent of Canadians didn’t have an opinion.