While Americans have gradually come to realize that the Internal Revenue Service was used as a partisan tool to attack the Tea Party movement over two election cycles, it is increasingly clear this scandal may become the biggest of the three scandals that rocked the Obama administration last week.

In 1854, Wisconsin rejected the federal Fugitive Slave Act, which mandated Northern states return Southern slaves without due process, demonstrating both the validity and usefulness of nullification.

Only after the curfew in Watertown, Massachusetts, was lifted and alert resident David Hanberry went outside his home to get a smoke, according to news reports, did the case of the Boston Marathon bombing manhunt for suspect Dzhokhar Tsarnaev crack open. That was when Hanberry saw blood on the tarp of his dry-docked boat and called the police.

The war within the Republican Party between the old-guard establishment neoconservatives and the upstart constitutionalist/libertarian-leaning rebels is raging, and the liberty movement is gaining on the establishment.

April 19 marks the 20th anniversary of the Waco, Texas, massacre of Branch Davidian church members at the organization's Mount Carmel compound. Some 82 Davidians (including 26 children) and four ATF agents were killed in two related episodes.

Violence has erupted across Venezuela after a disputed April 14 presidential election, where sitting Vice President Nicholas Maduro narrowly prevailed in official tallies over opposition candidate Henrique Capriles.

The motive behind the April 15 twin bombings at the Boston Marathon, which killed at least three and injured more than 175, remains shrouded in mystery as of Tuesday afternoon. 

President Obama's recently released fiscal 2014 budget proposal would continue near-record level deficits despite tax hikes, largely because it would increase spending by more than 20 percent over the next five years.