Is it legal to directly tie a campaign donation to how a US Congressman votes on a bill?
<p>If you had a connection to a congressman, and spoke to him directly, and said vote yes (or no) on a bill and I will give your upcoming campaign $1M dollars, would that be considered legal under US law?</p>

<p>That is <em>quid pro quo</em> corruption and/or bribery, and is a felony.</p>

<p>See (<em>inter alia</em>) <a href="https://www.law.cornell.edu/uscode/text/18/201" rel="nofollow">18 U.S.C. §201</a>, specifically (c)(1)(A), which imposes a fine or jail to anyone who:</p>

<blockquote>
  <p>directly or indirectly gives, offers, or promises anything of value to any public official, former public official, or person selected to be a public official, for or because of any official act performed or to be performed by such public official, former public official, or person selected to be a public official</p>
</blockquote>

united-states