These Five Democrats sponsored HR7332 to prevent taxpayer funds from being used to build the border wall

Two are from California.

Their oath of office : “I, (NAME), do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I take this obligation freely, without any mental reservation or purpose of evasion; and that I will well and faithfully discharge the duties of the office on which I am about to enter. So help me God.”

Check out the nice, friendly name: H.R. 7332: Protect American Taxpayers and Secure Border Act  Some of the bill's content is here:

This Act may be cited as the Protect American Taxpayers and Secure Border Act.
2.Prohibitions and requirements relating to border security
(a)

In general

No taxpayer funds may be obligated or expended to build a wall or barrier intended to impede travel between Mexico and the United States.
(b)

Foreign payment required

Any wall or barrier described in subsection (a) that is proposed to be built shall be paid for using funds provided by the Government of Mexico.
(c)

Securing the southern border

The Secretary of Homeland Security shall take such actions as may be necessary to secure the southern border by making maximum effective utilization of technology and improved training of U.S. Custom and Border Protection agents and officers.
(d)

Increase in immigration judges

The Attorney General may appoint 100 additional immigration judges in addition to immigration judges currently serving as of the date of the enactment of this Act.
(e)

Humanitarian assistance

The Secretary of Homeland Security shall take such actions as may be necessary to ensure that humanitarian assistance is provided to immigrants, refugees, and other displaced persons who are in need of medical assistance and aid to sustain health and life.