"Four years of Donald Trump," former Vice President Joe Biden claims, "would be an aberration in American history. Eight years will fundamentally change who we are as a nation." Biden, of course, is running for president.
The period between elections for each federal office, used by the Federal Election Commission to set campaign contribution limits. A donor may give the hard money maximum to a House candidate every two years, a presidential candidate every four and a Senate candidate every six, for example.