Click the link to donate via PayPal, note, you do NOT have
to have a PayPal account to do this with a credit card, just bypass the paypal signup and scroll down and select "continue", exception
if you are using a credit card that IS ASSIGNED to a PayPal account,
you will be requested to login to PayPal or use another credit card

If you wish to use your checking account, it must be done by using PayPal—new accounts or new additions of a checking account will require a delay while PayPal verifies your checking account.