POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes
and appoints each of Joseph T. Green, Kirk D. Johnson,
Mary L. Brown, Dennis L. Klaeser, Kimberly K. Martin,
Suzanne R. Ryan, Thomas C. Shafer, and Kathleen S. Wendt,
signing singly, the undersigned's true and lawful attorney-in-fact to:

(1) Execute for and on behalf of the undersigned, in the undersigned's
capacity as an officer and/or director of TCF Financial Corporation,
formerly known as Chemical Financial Corporation (the "Company"),
Forms 3, 4, 5, and 144 (including applying for SEC filer codes)
in accordance with Section 16(a) of the Securities Exchange Act of
1934 and the rules thereunder;

(2) Do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete and execute any such
Form 3, 4, 5, or 144, complete and execute any amendment or amendments
thereto, and timely file such form with the United States Securities
and Exchange Commission and any stock exchange or similar authority; and

(3) Take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of
benefit to, in the best interest of, or legally required by, the
undersigned, it being understood that the documents executed by such
attorney-in-fact on behalf of the undersigned pursuant to this Power of
Attorney shall be in such form and shall contain such terms and conditions
as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned
might or could do if personally present, with full power of substitution
or revocation, hereby ratifying and confirming all that such attorney-in-fact,
or such attorney-in-fact's substitute or substitutes, shall lawfully do or
cause to be done by virtue of this power of attorney and the rights and powers
herein granted.  The undersigned acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of
the undersigned's responsibilities to comply with Section 16
of the Securities Exchange Act of 1934.

This authorization shall supersede all prior authorizations to act for the
undersigned with respect to securities of the Company in these matters, which
prior authorizations are hereby revoked.  This Power of Attorney shall remain
in full force and effect until the undersigned is no longer required to file
Forms 3, 4, 5, and 144 with respect to the undersigned's holdings of and
transactions in securities issued by the Company, unless earlier revoked
by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of this 29th day of July, 2019.

Signature:  /s/ Thomas J. Butterfield
Print Name:     Thomas J. Butterfield