Sen. Kirsten Gillibrand, D-NY, is reaching out to Wall Street executives to gauge potential support if she were to run for president in 2020, CNBC has learned.

Gillibrand has personally been working the phones and calling senior executives at Wall Street firms in recent weeks to see whether they would back her campaign if she jumps into the race, according to two senior business leaders who spoke on the condition of anonymity.

Donors in the financial community helped back Gillibrand’s successful re-election bid last year. Her effort to connect with business leaders this time comes as she contemplates entering what will likely be an expensive and protracted Democratic primary.