I can access the tag below via css_selector but how do I do a button click?
<a title="Sign In" onclick="toggleLogin('signInBlock','regBenefitsBlock');" href="javascript:void(0);">Sign In</a>
Any idea would be appreciated.
Locate the button by link text and use click() method:
button = driver.find_element_by_link_text("Sign In")
button.click()