Rick Mercer often attacks Stephen Harper and the Tories, but he saves some of choicest jabs for Justin Trudeau.

The CBC host ridiculed Trudeau and his team Tuesday night for failing to understand that the Liberal leader just isn't very funny. Every time Trudeau tries to make a joke, it seems to end in scandal.

"Last week he apologized to Ukraine; before that Alberta; before that the used car salesman of Canada; before that Peter Kent because when Peter Kent was Harper's Environment Minister, Justin called him a piece of... Well, you get the idea. And clearly three out of these four apologies were warranted," Mercer quipped.

But Mercer faults the Liberal "brain trust" as much as he does Trudeau. He said they should remember that Trudeau is "applying for the job of Prime Minister of Canada, not open mic night at the giggle barn.”

But Mercer couldn't resist getting in a jab or two at the prime minister.

"Is there not a single advisor in the Prime Minister's Office honest enough to say, 'Hey prime minister, great job in the House of Commons today, and uh, one more thing, you’re a horrible singer, so stop doing that.'"

Agreed. As Mercer says, if the aides won't tell the politicians the truth about the singing and dancing, how can we expect them to do anything about bad ideas?

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  • "Welcome to the world, little Hadrian. 8lbs 3oz, Sophie is wonderful, Xavier and Ella-Grace couldn’t be prouder," the Liberal leader tweeted on Feb. 28, 2014

  • Trudeau and his wife Sophie's two oldest children are Xavier James and Ella-Grace Margaret. Both are partially named after family.<a href="http://www.chatelaine.com/en/article/4970--the-littlest-trudeau" target="_hplink"> Xavier James is named after Trudeau's maternal grandfather James Sinclair</a> (the politician) and <a href="http://en.wikipedia.org/wiki/Sophie_Gr%C3%A9goire" target="_hplink">Ella-Grace Margaret is named after Trudeau's mother Margaret and Grace Elliot, Trudeau's paternal grandmother</a>.

  • Trudeau waves to the crowd of supporters as he holds his son Xavier and his wife Sophie Gregoire holds their daughter Ella-Grace after announcing he will seek the leadership of the party Tuesday, October 2, 2012 in Montreal. Xavier was born Oct. 18, 2007, which would have been Pierre Elliott Trudeau's 88th birthday. Ella-Grace was born on Feb. 5, 2009.

  • Trudeau, Gregoire and their children Xavier and Ella-Grace attended a ceremony for the raising of the Gwaii Haanas legacy totem pole in Windy Bay, B.C., on August 15, 2013.

  • Sophie Gregoire waves to the crowd as she arrives for her wedding to Justin Trudeau in Montreal Saturday, May 28, 2005.

  • Sophie used to visit the Trudeau family home when she was a child. She was a classmate and friend of Trudeau's youngest brother Michel, who died tragically in a B.C. avalanche in 1998. Justin and Sophie made contact again at a fundraiser in 2003 and soon after began dating. <a href="http://www.macleans.ca/canada/national/article.jsp?content=20050606_106678_106678" target="_hplink">Trudeau was so smitten</a> that he declared they would spend the rest of their lives together on the very first date.

  • Justin Trudeau with friends Mathieu Walker and Allen Steverman in Shanghai in 1994.

  • 11-year-old Justin jumps off an old cannon while visiting a fort along with his father in the Omani town of Nizwa and Jebel.

  • Then-prime minister Pierre Trudeau and 10 year-old son Justin walk toward a plane at CFB Ottawa on Nov. 7, 1982.

  • Alexandre (Sacha) Trudeau delivers a right hook to his older brother Justin during a play fight in 1980 at Ottawa airport as the boys await a flight with the return of their father, then-prime minister, Pierre Trudeau. Nobody was injured. Justin was born in 1971 and Sacha in 1973 - both on Christmas day.

  • March 1979 photo of the Trudeau children: Michel (front), Alexandre (Sacha) and Justin (rear).

  • It was a big day for Dad, but a long day for the three Trudeau children. Left to right, Justin, Michel and Alexandre (Sacha) Trudeau attended the swearing in ceremonies of their father Pierre Elliott Trudeau as Prime Minister March 3, 1980 at Government House.

  • Pierre Trudeau is saluted by RCMP Officer as he carries son Justin to Rideau Hall in 1973. <a href="http://www.huffingtonpost.ca/2013/02/14/justin-trudeau-cries-cried-photo-loyalist-college_n_2690299.html">Justin Trudeau teared up when he was presented with a framed copy while visiting Loyalist College in 2013</a>.

  • Born In Office

    <a href="http://en.wikipedia.org/wiki/Justin_Trudeau" target="_hplink">Trudeau was only the second child ever to be born while a parent was prime minister</a>. The first was John A. Macdonald's youngest daughter Margaret Mary Macdonald. Trudeau's younger brothers, Alexandre (Sacha) and Michel were the third and fourth.

  • Prime Minister Trudeau and his then-wife Margaret leave the city's Notre Dame Basilica Sunday afternoon after the christening of their 22-day old infant Justin Pierre James, Jan. 16, 1972. Tasseled shawls kept the baby hidden from photographers and the 10-degree-below-zero weather.