They signed the American Promise Pledge:
To support limits on the undue influence of money in elections and government
I support amending the United States Constitution to guard against corruption and
protect liberty, federalism, and the equal rights of free speech by limiting the undue
influence of money in elections and government.
I pledge to use my office to advance a Constitutional Amendment addressing the
above issues through passage and ratification in effective ways such as sponsoring
or cosponsoring bills, resolutions, or other legislation advancing proposal or
ratification of this Amendment; voting in favor of such bills and resolutions in
committee, subcommittee, or floor votes; and publicly advocating for the necessity
of this Amendment.