In December 2007, Baillie defended Labour leader Wendy Alexander on Newsnight Scotland, during the controversy regarding alleged illegal donations to Alexander's leadership campaign.[7]
In 2009, Baillie successfully brought into being an act of the Scottish Parliament, with the unanimous support of all MSPs, to allow for greater protection of disabled parking spaces.
Baillie has opposed minimum pricing of alcohol, being unconvinced about the overall benefits.[8] In 2010, she stated it would not be the best way of tackling the country's alcohol-related problems but instead backed a tax-based alternative amongst other measures.[9] The legislation was passed setting a minimum unit pricing floor price for a unit of alcohol of 50 pence per unit.[10]
On 27 March 2014, Baillie stood in for Johann Lamont at First Minister's Questions while Lamont was attending the funeral of veteran Labour politician Tony Benn.[14] She also stood in at FMQs following Lamont's resignation as Labour leader in October 2014.[15] Baillie ruled herself out of standing in the leadership election that followed Lamont's departure, stating that she wanted a "supporting role" rather than to be Labour leader.[16]
As a backbench MSP, Baillie campaigned for a public inquiry into a lethal outbreak of Clostridioides difficile infections at the Vale of Leven Hospital in her constituency. The inquiry into the outbreak cost £10 million, while the families were offered £1 million, something which prompted Baillie to plead Health Secretary Shona Robison for greater compensation for those affected, during a session of the Scottish Parliament in November 2014.[17]
In December 2017, Baillie was reduced to tears when raising the concern of fire safety following the deaths of two men in the Cameron House Hotel Fire.[18]
Deputy Leader of the Scottish Labour Party: 2020–present
In January 2020, Baillie announced that she would be standing as a candidate for the post of Deputy Leader of the Scottish Labour Party.[19] On 3 April, it was announced she had won the contest by 10,311 votes to Matt Kerr's 7,528 votes.[20] After she was elected, Leonard reappointed her to his frontbench as Scottish Labour Spokesperson for Finance. She served as acting Leader of the Scottish Labour Party since after the resignation of Leonard on 14 January 2021 and served until the election of Anas Sarwar as leader.
Between 2020 and 2021, Baillie was a member of Committee on the Scottish Government Handling of Harassment Complaints that concluded that the Scottish Government's handling of harassment complaints against Alex Salmond was "seriously flawed".[22][23] As a committee member, Baillie quizzed both Salmond and Nicola Sturgeon, asking the latter: "You have described these errors as catastrophic. That's a strong word, tell me why then nobody has resigned? Nobody has taken responsibility of this, because at the heart of this two women have been let down."[24] Former BBC journalist Andrew Neil said of Baillie's questioning, "As a professional interviewer... there were many times when I thought Jackie Baillie was the only one that knew the questions to ask."[25]
On 19 March 2021, the findings of the committee were pre-emptively leaked to the media by an MSP. Baillie backed an inquiry into the leak and said: "The leaks against the women were particularly bad, because they had the bravery to come forward to speak to the committee. It was entirely inappropriate that that information was leaked to the public domain."[26]
In the run up to the 2021 Scottish Parliament election, former SNP Depute Leader Jim Sillars donated £2,000 to her campaign to be re-elected. “I would prefer her in the parliament to a clone on the backbenches," Sillars said. "I don’t think there is any doubt she is an asset to the parliament. My concern, in donating to Jackie Baillie, was to have a very able person in parliament."[27]
Ballie was re-elected in May 2021 with an increased majority of 1,483, with Dumbarton becoming the only seat to have voted Labour for the entirety of the devolved era.[28] After her victory, she told her constituents: "You want a recovery, not a referendum. You want us to prioritise your jobs, the economy, the NHS. You want us to make sure that our kids at school have all the opportunities they deserve. I pledge to you that I will do that in this next parliament."[29]