Democrats have chosen Chicago to host their 2024 national convention. The selection announced Tuesday is intended to keep the Democratic Party’s momentum going after last fall’s midterm election success in the critical Midwest. President Joe Biden chose Chicago over finalists that also included Atlanta and New York. Chicago is solidly Democratic, as is Illinois. But holding the party’s convention in such a pro-union city underscores Biden’s commitment to organized labor, which will be vital to his bid for a second term. Democrats also had a strong showing in Michigan last fall and hope to repeat that elsewhere in the region. The choice could counter Republicans, who'll hold their 2024 convention in Milwaukee.