The phrase "a string of populist" is correct and usable in written English.
It can be used to describe a series of populist statements, actions, or policies, often in a political context.
Example: "The candidate's speech was filled with a string of populist promises aimed at winning over the electorate."
Alternatives: "a series of populist" or "a chain of populist".
In order to win over red-shirt supporters, his government has announced a string of populist economic policies, such as free schooling for 12m students, more financial support for the elderly and, most recently, low-cost loans for the poor.
The film-makers: Richard Brooks (1912-92) started out as a screenwriter ( Key Largo, (1948)), but made his name as a director with a string of populist social-issue films: Blackboard Jungle (1955), Cat on a Hot Tin Roof (1958), Elmer Gantry (1960).
The opposition victory was the latest in a string of setbacks for incumbent populist leaders in the region, including Argentina's Cristina Fernández de Kirchner, whose hand-picked candidate Daniel Scioli was defeated last month by the centre-right Mauricio Macri.
He led a string of coalition governments pursuing nationalist and populist policies until October 1998, when an alliance of liberals, centrists, left-wingers and ethnic Hungarians ousted him, forming a new coalition with Mikulas Dzurinda as prime minister.
Populist politicians in a string of countries, not least the UK, are playing on public fears about migrant workers undermining their pay.
Second, as Mr Verheugen puts it, there is a "new political climate" in Europe with the rise of populist anti-immigration parties in a string of EU countries.
The lenders shot down both proposals.In the end, Mr Orbán's populist conservative Fidesz party opted for a string of windfall taxes on mainly foreign companies and turned its back on the multilateral lenders.
In free fall after losing a string of regional elections, the leader of the Free Democrats, Philipp Rösler, has adopted a strident populist and euro-skeptic policy.
Mr. Mbeki's loss is usually cast as a gain for his chief rival Jacob Zuma, a populist who has become a favorite of South Africa's left, despite trailing a string of corruption and sexual scandals.
Before last September's general election, the populist, free-marketeering Progress Party of Carl I. Hagen was being written off as a spent force, after a string of sex scandals and internecine feuding.
It has suffered a string of setbacks.
